XAML 3D Chess

Last January, I gave a presentation on XAML to the Metro Toronto .NET User Group. I had the fortune of meeting Valentin IIliescu at the presentation - he is currently in the process of converting his chess application to XAML. It's great to see active Longhorn developers in the Toronto area.
He recently transformed a 2D chess game to 3D XAML! It's one of the most compelling XAML apps I've seen to date. He also created a proof of concept mapping application that's quite cool.
Check out and download his application (with source code) here: http://www.valil.com/avalon/
His blog is available here: http://spaces.msn.com/members/viliescu/