Category Archives: professional

Developers and mobile platforms: lies, damn lies and surveys

I’ve been reading the IDC/Appcelerator developer survey about their attitudes to mobile platforms. The survey covered 2,760 Appcelerator Titanium developers between April 11-13, so it is certainly current and with a sample just about big enough to be interesting.

The survey asks developers if they are “very interested” in developing for specific platforms, with the following results, and with comparisons to 3 months ago:

  • 91% iPhone (fractionally down)
  • 86% iPad (fractionally down)
  • 85% Android phones (down from 87%)
  • 71% Android tablets (down from 74%)
  • 29% Windows Phone 7 (down from 36%)
  • 27% Blackberry phones (down from 38%)

The survey is titled:

Apple shines, Google slows, and Microsoft edges RIM in battle for mobile developer mindshare.

Is that a fair summary? It is not what I would highlight. I cannot read the exact figures from the chunky graphic, but it is clear that the iOS figures are also fractionally down, maybe by just 1%, but hardly much different from the Android figures on a sample of this size. Both are pretty much flat.

The figures for Windows Phone 7 and Blackberry are more dramatic; though we should at least note that Appcelerator Titanium is a cross-platform toolkit that does not currently support Windows Phone 7, and that its support for Blackberry is only in preview. That was true last time round as well, but I’m not sure that asking developers about their plans for a platform which the toolkit does not currently support is the best way to gauge overall interest.

Another question that interests me: is developer interest a cause or an effect of a mobile platform’s success? A bit of each, no doubt; but personally I think the “effect” model is stronger than the “cause” model. Developers pick a platform either because they have immediate customers for apps on that platform, or because they think they can make money from it.

Nurturing a strong developer community is definitely important for a platform provider; but I doubt it ranks as highly as other factors, like building a strong retail presence, delivering excellent devices at the right price, and focusing on usability and a good end-user experience.

If you are interested in Appcelerator Titanium you might like to read my interview with the CEO at Mobile World Congress; and this discussion on whether Titanium really builds native apps.

Implications of Amazon’s cloud failure

Amazon is into day three of a major failure of its Elastic Compute Cloud at its North Virginia datacenter, and at the time of writing it is still not fully recovered.

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I am reminded of a prescient remark by Tony Lucas at Flexiant, a UK cloud provider, who told me a couple of years ago (with commendable honesty) that cloud failures will be rare, but when they occur will be on a grand scale.

It seems that it is hard to engineer around the possibility of cascading failure. I am not sure what happened in North Virginia, but Amazon says on its status page that:

A networking event early this morning triggered a large amount of re-mirroring of EBS volumes in US-EAST-1. This re-mirroring created a shortage of capacity in one of the US-EAST-1 Availability Zones, which impacted new EBS volume creation as well as the pace with which we could re-mirror and recover affected EBS volumes. Additionally, one of our internal control planes for EBS has become inundated such that it’s difficult to create new EBS volumes and EBS backed instances.

It sounds like an automated recovery system built into the compute cloud actually became the problem, as a large number of volumes tried to fix themselves at the same time.

This is not the first Amazon outage, but I believe it is the most severe; though it could have been worse and I have not heard that any data was lost. What are the implications?

Any computer system can fail. There will be a lot of companies reflecting on this though, both those directly affected and others, and realising that the cloud can be a single point of failure, despite the scale and expertise which a company like Amazon invests in high availability.

Is Amazon EC2 more or less likely to fail for an extended period than Salesforce.com? Or Microsoft Azure? Or Google App Engine, or Gmail, or IBM’s evolving SmartCloud? Clearly an excellent question; but I am not sure how we go about answering it other than by reviewing historical performance. I do not expect any of these companies to take advantage of Amazon’s problems to proclaim their own superior resiliency; they will all be worrying too much about the same thing happening on their platforms.

My guess is that the industry will get better at this, and that at some unspecified future moment the chance of one of these cloud platforms failing for three days will become exceedingly small – of course risk can never be eliminated, only reduced.

It seems that the risk is not exceedingly small on Amazon’s cloud today; and we should probably assume that the same applies to other providers.

That is something we have always known, so in one sense nothing has changed. This outage is a sharp reminder though; and planning for failure is a hidden cost of cloud computing that has now been brought into the light.

Native apps better than web apps? That’s silly talk says PhoneGap president

When I attended Mobile World Congress in February one of my goals was to explore the merits of the various different approaches to writing cross-platform mobile apps. One of the key ones is PhoneGap, and I got in touch with Nitobi’s president and co-founder André Charland. As it turned out he was not at that particular event, but he kept in touch and I spoke to him last week.

PhoneGap works by using the installed HTML and JavaScript engine on the device as a runtime for apps. That is not as limiting as it may sound, since today’s devices have high performance JavaScript engines, and PhoneGap apps can be extended with native plug-ins if necessary. But aren’t there inconsistencies between all these different browser engines?

Sure, it’s kinda like doing web development today. Just a lot better because it’s just different flavours of WebKit, not WebKit, Gecko, whatever is in IE, and all sorts of other differentiation. So that’s definitely how it is, but that is being overcome rather quickly I’d say with modern mobile JavaScript libraries. There’s JQuery Mobile, there’s Sencha Touch, there’s DoJo Mobile just released, SproutCore, which is backed by Strobe, which is kinda the core of Apple’s MobileMe.

There’s tons of these things, Zepto.js which is from the scriptaculous guy, Jo which is a framework out of a Palm engineer, the list of JavaScript frameworks coming out is getting longer and longer and they’re getting refined and used quite a bit, and those really deal with these platform nuances.

At the same time, phone manufacturers, or iOS, Android, WebOS, and now RIM, they’re competing to have the best WebKit. That means you’re getting more HTML5 features implemented quicker, you’re getting better JavaScript performance, and PhoneGap developers get to take advantage of that.

says Charland. He goes further when I put to him the argument made by native code advocates – Apple CEO Steve Jobs among them – that PhoneGap apps can never achieve the level of integration, the level of performance that they get with native code. Will the gap narrow?

I think it will go away, and people will look back on what they’re saying today and think, that was a silly thing to say.

Today there are definitely performance benefits you can get with native code, and our answer to that is simply that PhoneGap is a bundle made of core libraries, so at any point in your application that you don’t want to use HTML and JavaScript you can write a native plugin, it’s a very flexible, extensible architecture … So you can do it. We don’t necessarily say that’s the best way to go. Really if you’re into good software development practices the web stack will get you 90%, 95% of the way there, so that apps are indistinguishable from native apps.

Some of the native features we see in iOS apps, they’re reminiscent of Flash home pages of ten years ago, sure you can’t do it in HTML and JavaScript but it doesn’t add any value to the end user, and it detracts from the actual purpose of the application.

The other thing is, a lot of these HTML and JavaScript things, are one step away from being as good in a web stack as they are in native. When hardware acceleration gets into WebKit and the browser, then performance is really just as good.

Charland is also enthusiastic about Adobe’s recent announcement, that PhoneGap is integrated into Dreamweaver 5.5:

Two things are exciting from our perspective. It gives us massive reach. Dreamweaver is a widely used product that ties in very nicely to the other parts of the creative suite toolchain, so you can get from a high-level graphic concept to code a lot quicker. Having PhoneGap and JQuery Mobile in there together is nice, JQuery Mobile is definitely one of the more popular frameworks that we see our community latching on to.

The other thing is that Dreamweaver targets a broader level of developer, it’s maybe not super hard core, either Vi or super-enterprise, Eclipse guys, you know, it’s people who are more focused on the UI side of things. Now it gives them access to quickly use PhoneGap and package their applications, test them, prove their concepts, send them out to the marketplace.

He says Adobe should embrace HTML and Flash equally.

I also asked about Windows Phone support, and given that Microsoft shows no sign of implementing WebKit, I was surprised to get a strongly positive response:

We have something like 80% of the APIs in PhoneGap running on Windows Phone already. That’s open and in the public repo. We are just waiting basically for the IE9 functionality to hit the phone. The sooner they get that out in public, the sooner we can support Windows Phone 7. We have customers knocking at our door begging for it, we’ve actually signed contracts to implement it, with some very large customers. Just can’t there soon enough, really. I think it’s an oversight on their part to not get IE9 onto the phone quicker.

PhoneGap is at version 0.94 at the moment; Charland says 0.95 will be out “in a few weeks” and he is hoping to get 1.0 completed by O’Reilly OSCON in July.

I’ve posted nearly the complete transcript of my interview, so if you are interested in Charland’s comments on building a business on open source, and how PhoneGap compares to Appcelerator’s Titanium, and what to do about different implementations of local SQL on devices, be sure to read the longer piece.

Is Appcelerator Titanium native? And what does native mean anyway?

Of course we all know that Microsoft’s IE9 and the forthcoming IE10 are native – VP Dean Hachamovitch said so many times during his keynote at the Mix 2011 conference earlier this week. That has sparked a debate about what native means – so here is another interesting case.

Appcelerator’s Titanium cross-platform tool for mobile development is native, or at least that is what it claims:

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Now, I am not sure that native has a precise definition, but to me it suggests a compiled application, rather than one interpreted at runtime. So this description of how Titanium executes JavaScript – its main language – is surprising:

In a Titanium Mobile application, your source code is packaged into a binary file and then interpreted at runtime by a JavaScript engine bundled in by the Titanium build process. In this guide, you will learn more about the JavaScript runtime environment that your code runs in. Titanium runs your application’s JavaScript using one of two JavaScript interpreters – JavaScriptCore on iOS (the interpreter used by Webkit) and Mozilla Rhino on Android and BlackBerry.

So a Titanium application is actually interpreted.

Native is a vague enough term that Appcelerator can no doubt justify its use here. “Native UI” is fair enough, so is “Native capabilities.” Native performance? That seems to me a stretch, though JavaScript performance is good and constantly improving. Appcelerator even has a web page devoted to what it means by native.

Titanium is also open source. Anyone doubtful about how it works need only consult the code.

In the light of Microsoft’s statements, it is interesting that what Appcelerator really means by native is “not a web page”:

Build Native Apps … Everything else is basically a web page.

So can an application be both native and interpreted? What about Silverlight apps on Windows Phone 7, are they native? Adobe AIR apps, surely they are not native? Google Android has a Native Development Kit which is introduced thus:

The Android NDK is a companion tool to the Android SDK that lets you build performance-critical portions of your apps in native code.

The implication is that byte code executed by the Dalvik virtual machine, which is the normal route for an Android app, is in some sense not native code. Which also implies that Appcelerator’s claims for Titanium are at least open to misunderstanding.

Oracle says OpenOffice non-strategic, ceases commercial versions. Time to reunite with Libre Office?

The OpenOffice story has taken a curious turn today with Oracle announcing that it intends to cease the commercial versions of this office suite and to move the project a non-commercial organisation.

What the press release does not say is that there is already a non-commercial organisation working on the OpenOffice code. The Document Foundation was formed  in September 2010 against Oracle’s wishes. This online OpenOffice meeting shows some of the tensions:

(21:59:42) louis_to: your role in the Document Foundation and LibreOffice makes your role as a representative in the OOo CC untenable and impossible
(22:00:01) Andreas_UX: I would support that. I think that the more we discuss the more we will harden the fronts
(22:00:17) louis_to: it causes confusion, it is a plain conflict of interest, as TDF split from OOo

In this dialog, louis_to is Louis Suárez-Potts who works at Oracle as OpenOffice.org community manager.

Oracle’s Edward Screven, Chief Corporate Architect, says in the new press release:

We believe the OpenOffice.org project would be best managed by an organization focused on serving that broad constituency on a non-commercial basis. We intend to begin working immediately with community members to further the continued success of Open Office.

Why is Oracle distancing itself from OpenOffice? The implication is that it is non-strategic and not broadly adopted among Oracle customers, because these two factors are given as reasons for continuing with Linux and MySQL:

We will continue to make large investments in open source technologies that are strategic to our customers including Linux and MySQL. Oracle is focused on Linux and MySQL because both of these products have won broad based adoption among commercial and government customers.

The question now: will Oracle try to set up an independent foundation to compete with the Document Foundation? Or will there be a reconciliation, which would seem the only sensible way forward?

Background: OpenOffice was originally a commercial suite called Star Office. It was bought by Sun and made free and open source in an attempt to loosen Microsoft’s hold on business computing. While OpenOffice has been popular, in the business world OpenOffice has had little impact on the success of Windows and Office. That said, it is possible that Microsoft’s development of the Office Ribbon and the huge effort behind Office 2007 was partly driven by a desire to differentiate and improve its product in response to the OpenOffice competition.

All-new Adobe Audition is re-written for cross-platform, some features not yet ported

Adobe’s forthcoming Creative Suite 5.5 includes a significant change to its audio editing support. The Soundbooth application has gone, replaced by a new version of Adobe Audition for both Mac and Windows.

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I thought this was good news. Audition has always been an excellent product, even back in the days when it was Cool Edit from Syntrillium – Adobe acquired Syntrillium’s technology in 2003. I found it difficult to understand why Adobe had two audio products, especially when Soundbooth is not as capable as Audition. Until now though, Audition was Windows-only, and Creative Suite is cross-platform for Mac and Windows.

Now Adobe’s Durin Gleaves has posted in detail about the history of Soundbooth and Audition. The rationale for Soundbooth was not that suite users required a simpler audio editor, as Adobe had told me previously, but rather that porting Audition was too difficult:

The Audition team looked at the 15 years of legacy Windows code and were not confident the application could be ported quickly enough to satisfy the CS release schedule. As an audio editor was necessary in the suite package, we created Soundbooth which was a simple audio editor built on top of Premiere Pro’s media playback engine. This enabled the team to provide value to the Suite, but the limitations of a playback engine crafted to handle large video files was not ideal for detailed audio production.

To Adobe’s credit, it did not give up on bringing Audition to Creative Suite but has spent two years re-writing Audition in cross-platform code:

So we’ve spent the past two years re-writing Audition from the ground-up, preserving or updating our core DSP, modernizing the code to take advantage of current hardware and operating system technology, and emphasizing increased productivity and speed with every feature.

says Gleaves. The new Audition is optimised for multi-core systems and makes full use of background processing to improve productivity. On the Mac it supports Core Audio and Apple AudioUnit effects, and on Windows ASIO, though there is no mention of WASAPI, the low-latency audio API in Windows Vista and Windows 7. Steinberg’s VST (Visual Studio Technology) is supported on both platforms.

It it is not all good news though. To some extent Audition in CS 5.5 is a new application, and not all the features of Audition 3 have made it across. Gleaves lists the following as features which are not in this version:

  • Tone and noise generation
  • Pitch correction
  • Scientific filters
  • Graphic Phase Shiftter
  • MIDI support
  • CD burning

Most of these are likely to return in a future update.

While it is a shame to see missing features, it makes sense for Adobe to unify its audio development effort on a new and solid base.

One other thing I should mention. Soundbooth has a feature called Analyze Speech for which I had high hopes, as I frequently need to transcribe interviews, but in practice the results were disappointing. I suspect it may work reasonably when there is a script with which to match the audio. That does raise the question though: are there any features in Soundbooth that will be missed following the transition to Audition?

Windows Phone at Mix 2011: what Microsoft said and did not say

Yesterday Microsoft’s Joe Belfiore (phone VP) and Scott Guthrie (developer VP) took the stage at the Mix 2011 conference in Las Vegas to tell us what is new with Windows Phone.

The opening part of the keynote was significant. Belfiore spent some time talking about the “update situation”.

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This is all to do with who controls what ends up on your phone. If you buy a Windows PC or laptop, you can get updates from Microsoft using Windows update or by downloading service packs; the process is between you and Microsoft.

Not so with Windows Phone. The operators have a say as well; and operators are not noted for delivering speedy OS updates to users. Operators seem to have difficulty with the notion that by delivering strong updates to existing devices that have already been purchased, they build user loyalty and satisfaction. They are more geared to the idea of delivering new features with new hardware. Updating existing phones can cause support calls and other hassles, or even at worst bricked devices. They would rather leave well alone.

When Microsoft launched Windows Phone it announced that there would be regular updates under Microsoft’s control; but this has not been the case with the first update, codenamed “NoDo”. The update process has been delayed and inconsistent between operators, just like the bad old days of Windows Mobile.

Belfiore went on about testing and phones being different from PCs and improvements to the process; but in the end it seems to me that Microsoft has given in:

Mobile operators have a very real and reasonable interest in testing updates and making sure they’re going to work well on their phones and on their network. Especially if you think about large operators with huge networks, they are the retailer who sells the phone, so they have to deal with returns, they take the support calls and they have to worry about whether their network will stay up and perform well for everyone … From our point of view, that’s quite reasonable, and our belief and understanding is that it’s standard practice in the industry that phones from all different vendors undergo operator testing before updates are made available.

That “testing” label can cover any amount of prevarication. It appears that Microsoft is unable to achieve what Apple has achieved: the ability to update its phone OS when it wants to. That is a disadvantage for Microsoft and there is no sign of improvement.

More positively, Microsoft announced a number of significant new features in the first major update to the OS, codenamed Mango. This is for existing devices as well as new ones, though new devices will have enhanced hardware. He focused on what matters for developers, and hinted that there will be other end user features. A few bullet points:

  • Internet Explorer 9 is on Mango – “The same exact code that has just shipped and is now getting installed on tons and tons of PCs is the code base that will be on the phone” said Belfiore. No, it is not built in Silverlight.
  • Limited multitasking for third-party apps. This is in the form of “Live agents” which run in the background. Full apps cannot multitask as I understand, though they can be suspended in memory for fast switching. Currently apps appear to do this but it is faked; now it will be for real, with the proviso that a suspended app may get shut down if its memory is needed by the OS.
  • Multiple live tiles for a single app.
  • Fixed marketplace search so that music does not appear when you search for an app.
  • Apps can register with search so that Bing searches can integrate with an app.
  • There will be a built in SQL Server CE database with programmatic access using Linq (Language Integrated Query).
  • Full TCP/IP socket support
  • Access to raw camera data for interesting imaging applications or barcode  processing
  • 1,500 new APIs in Mango
  • Performance improvements including a better garbage collector that apparently gives a significant boost
  • Improved tools with the ability to simulate GPS on the emulator, capture performance trace log from phone

It adds up to a decent update, though more Window Phone 7.5 than Windows Phone 8 (I do not know what the official name will be). Belfiore also mentioned new apps coming to Windows Phone 7, including Spotify, Skype and Angry Birds.

But what was not said? Here are a few things I would like to have heard:

  • When will get Adobe Flash on Windows Phone? Not mentioned.
  • What about Silverlight in the browser? You would think this would be easy to implement; but I have not seen it confirmed (let me know if you have news).
  • When will Nokia ship Windows Phone devices? Nokia’s Marco Argenti appeared on stage but said nothing of substance.
  • The Mango update is coming “in the fall” but when will current users get updates?
  • Will Windows Phone 8 move away from Windows CE to full Windows, so the same OS will work across phone, tablets and desktop PCs?

Above all, I would like convincing news about how Microsoft intends to get Windows Phone better exposure and fuller support from operators. I still hardly see it in retailers, and it seems a long way down the list when you talk to a salesperson about what new phone you should buy. I do not have a Windows Phone at the moment, but when I tried it for a  couple of weeks I mostly liked the user interface – I found the soft buttons on the Mozart annoying because they are easy to press accidentally – and I also like the developer tools, though I would like to see a native code development option. In the end though, it is no use developing for Windows Phone if your customers are asking for Apple iOS and Google Android.

Microsoft shared the following figures:

  • 12,000+ apps
  • 35,000 registered developers
  • 1.5 million tool downloads

It is a start, but these are not really big numbers, and the proportion of tool downloaders that end up delivering apps seems small so far.

A lot rests on the Nokia partnership and how that plays out.

It now appears that we will need to wait until September and the newly announced PDC (Professional Developers Conference) in Anaheim 13th-16th September before we learn more about the long-term mobile strategy.

Update: Microsoft’s Phil Winstanley tells me that the Windows Phone OS is just called “Windows Phone” regardless of version; but that the Mango update is referred to as “Windows Phone OS 7.5” when it is necessary to differentiate. If that sounds confusing, do not blame me!

When will Intel’s Many Integrated Core processors be mainstream?

I’m at Intel’s software tools conference in Dubrovnik, which I have attended for the last three years, and as usual the big topic is concurrent programming and how to write code that takes advantage of the multiple cores in today’s computers.

Clearly this remains a critical subject, but in some ways the progress over these last three years has been disappointing when it comes to the PCs that most of us use. Many machines are only dual-core, which is sub-optimal for concurrent programming since there is an overhead to multi-threading programming that eats into the benefit of having two cores. Quad core is now common too, and more useful, but what about having 50 or 80 or more cores? This enables massively parallel processing of the kind that you can easily do today with general-purpose GPU programming using OpenCL or NVidia’s CUDA, but not yet on the CPU unless you have a super computer. I realise that GPU cores are not the same as CPU cores; but nevertheless they enable some spectacularly fast parallel processing.

I am interested therefore in Intel’s MIC or Many Integrated Core architecture, which combines 50 or more CPU cores on a single chip. MIC is already in preview, with hardware codenamed Knight’s Corner and a development kit called Knight’s Ferry. But when will MIC hit the mainstream for servers and workstations, and how long is it until we can have 50 cores on a commodity desktop PC? I spoke to Intel’s chief evangelist James Reinders.

Reinders first gave me some background on MIC:

“We’ve made those bold steps to dual core, quad core and we’ve got even ten core now, but if you look inside those microprocessors they have a very simple structure. All the cores are hooked together and share their connection to memory, through a shared cache usually that’s on the chip. It’s a simple computer structure, and we know from experience when you build computers with more and more processors, that eventually you go to more sophisticated connections between the cores. You don’t build a 1000-processor super computer and hook them all together with a bus to one memory.

“It’s inevitable that on a chip we need to design a more sophisticated connection. That’s what MIC’s about, that’s what the Larrabee project has always been about, a belief that we should take a bunch of x86 cores and hook them together with something more sophisticated. In this case it’s a ring, a bi-directional, 512-bit wide high performance ring, with multiple connections to memory off the chip, which gives us more bandwidth.

“That’s how I look at MIC, it’s putting a cluster-type of design on a chip.”

But what about timing?

“The first place you’ll see this is in servers and in workstations, where there’s a lot of demand for a lot of computation. In that case we’ll see that availability sometime by the end of 2012. The Intel product should be out late in that year.

“When will we see it in other devices? I think that’s a ways off. It’s a very high core count part, more than 50, it’s going to consume a fair amount of power. The same part 18 months later will probably consume half the power. So inside a decade we could see this being common on desktops, I don’t know about mobile devices, it might even make it to tablets. A decade’s a long time, it gives a lot of time for people to come up with innovative uses for it in software.

“We’ll see single core disappear everywhere.”

Incidentally, it is hard to judge how much computing power is “enough”. Although having many CPU cores may seem overkill for everyday computing, things like speech recognition or on-the-fly image processing make devices smarter at the expense of intense processing under the covers. From super computers to smartphones, if more computing capability is available history tells us that we will find ways to use it.

Microsoft releases IE10 preview, talks up native HTML5

Microsoft has released an early preview of Internet Explorer 10, which you can download now. It shows the company’s commitment – for the moment – to an energetic release cycle for its web browser.

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Why use IE? Microsoft is pushing the notion that only IE is truly native on Windows:

IE10 continues on IE9’s path, directly using what Windows provides and avoiding abstractions, layers, and libraries that slow down your site and your experience.

In practice, this means using the Windows graphic stack directly and integrating with the Windows shell through features like jump list support on Windows 7.

IE10 supports more CSS3 standards including multi-column layout, Grid layout and Flexible Box Layout,  and Gradients. There is also support for EcmaScript 5 Strict Mode, which enforces tighter standards so reducing the likelihood of errors. Strict Mode is optional; if a web browser tried to apply it to the entire web lots of pages would break.

Microsoft is promising to support additional CSS3 standards including transitions and 3D transforms, though these are not in the preview. New preview releases will appear every 8-12 weeks.

According to Corporate VP Dean Hachamovitch, the company is steering a tight path between falling behind, and implementing immature standards:

When browsers prematurely implement technology, the result is activity more than progress. Unstable technology results in developers wasting their time rewriting the same site.

he writes in a blog post.

IE10 was announced today at the Mix conference in Las Vegas. Mix seems to be featuring equal measures of HTML5 and Silverlight, which makes for an interesting tension. News on Windows Phone is also promised, though I am not sure whether this is the moment when Microsoft will tell us about the next generation of Windows Phone and how it ties in with Windows 8 and with tablet devices. All will be revealed (or not) tomorrow.

Adobe announces Flash Builder for PHP, PhoneGap integration in Dreamweaver

Adobe has stepped up its support for mobile and Flash development with a couple of announcements today.
The first is that Dreamweaver 5.5, part of the new Creative Suite 5.5, has integrated support for PhoneGap. PhoneGap lets you build apps for Apple iOS and Google Android using HTML and JavaScript, taking advantage of the WebKit runtime that is present in these devices. The apps are packaged as native apps and also have access to some device-specific features. This does not mean Adobe is abandoning Flash, but is part of a both/and strategy, which makes sense to me.
Adobe has also announced Flash Builder 4.5 for PHP, in partnership with Zend. A great feature is that you can debug seamlessly from PHP code on the server to Flex code running in a Flash client, provided you are using Zend server.
Flex 4.5 compiles to AIR apps on Android, Blackberry and iOS, as well as desktop Mac, Windows and Linux.
The new Flash Builder products will ship within 30 days. The premium edition is part of the Creative Suite bundle or available separately, while Flash Builder for PHP is a separate purchase at $399 or €319 for Standard, and $799 or €629 for Premium.
More news on this and screenshots soon.