The open source gaming engine WiMo-GF has been updated to target Silverlight. That means the games you build for Windows Mobile, Zune HD will be able to run on Silverlight 3.0 as well.
Here’s our sample game Y.A.B.O.G. (Yet Another Break Out Game).
WiMo-GF is still in the preview phase but is mostly feature complete. Anything built targeting the existing interfaces will work in the final version.