• It sounds like the Shaxam folks are improving their Lightwave to XAML exporter. Richard Godfrey has two fantastic examples up on his blog.
• Chris Cavanagh has created a little 3D physics XBAP demo and he has also posted the source.
• Japan's famous Asahiyama Zoo released an XBAP called "Mother Earth." 3D is used for the leaping intro and the rotating Earth.
• Yousef has used the MS Virtual Earth APIs to create a zoomable globe XBAP.

-- Jordan