XNA on Zune and X-Box Live
Two pieces of news today in the "damn that's cool" category.
First, Microsoft has announced that you will now be able to use XNA to create games that run on Zune.
Second, XBox live will have a "XBox Live Community Games" section where you can upload your own games for purchase / download / etc.
Both of these are huge.
[1] http://blogs.msdn.com/johan/archive/2008/02/21/games-on-the-zune.aspx
[2] http://blogs.msdn.com/xna/archive/2008/02/20/announcing-xbox-live-community-games.aspx