It's been talked about since the initial hype of the Zune, and it's finally here. Zune Games. Using XNA Game Studio 3.0 (preview release), indie developers can start work on Zune games.

FAQ: http://forums.xna.com/ShowThread.aspx?PostID=46553
Discussion Thread: http://forums.xna.com/thread/46557.aspx

I for one am very excited! IMO, the Zune has a lot of gaming potential, and I'm eager to see where this goes.