http://blogs.msdn.com/surface/archive/2009/01/06/xna-blocks-on-microsoft-surface.aspxHere's something fun. Take a developer and a few hours time and you've got the app below from Rodney Guzman with InterKnowlogy . The app is a bunch of cubes in a box that you can interact with your hands. What's great about this app is that it shows theen-USCommunityServer 2.1 SP1 (Build: 61025.2)