Blender XAML exporter for Vista’s Windows Presentation Foundation framework
The next major release of Microsoft’s OS, Vista, will embed a new UI subsystem called Windows Presentation Foundation (WPF), part of the managed WinFX framework; WPF will introduce XAML, an XML based descriptive language which enables developers to manipulate the object model to do such things as display a 3D object in a window with a few lines of code.
You can take a look at Daniel’s tests here while the exporter can be downloaded directly from gotdotnet.com.

I made a number of upgrades to the xaml export script, and you can find it here:
http://www.codeplex.com/xamlexporter
Daniel did a code review. So, party on :)
You can see some Blender\WPF demos of the results here:
http://www.therhogue.com/WinFX
Essentially, you can now export the mesh after modifiers and effects have been applied, and the animated frame currently selected will get exported. There are a number of other extras too.
enjoy
TheRHogue