XNA Zune games from Channel9
Channel9 has posted this video about the XNA framework games running on the Zune. It does crash at one point, but this isn't even out for all Zune users yet, so it doesn't really matter. Hopefully they're cooking up some fun games for XNA, like the "Alien Takeover" game demoed in the video.
The XNA game studio for Zune will be available in a few weeks from now! Let's start the Zune game madness!