Mono’s Miguel de Icaza reports on a new GUI library for Mono:

We have been working on a technology that we believe will revolutionize user interfaces. Today we are announcing the response to Microsoft’s WPF/XAML, a response to Flash and WPF/E. A cross-platform GUI toolkit (supports Windows, MacOS and Linux and is easily ported to new platforms) written entirely in managed code and 100% open source.

There is some skeletal documentation for gui.cs.

Maybe this will be fantastic, but for the moment this looks like an early prototype, not a revolution in user interfaces. How is this hype justified?

Personally I reckon Mono will have to implement WPF eventually, if it wants to keep in touch with what is happening with Microsoft .NET.