My man Michael Klucher ( who was up all night incidentally, as was Dean) has more of the info you need to know on the release of XNA Game Studio 2.0: http://blogs.msdn.com/xna/archive/2007/12/13/xna-game-studio-2-0-released.aspx
And once you've absorbed the new features of the framework and tools, put them to great use in the Dream Build Play contest! Finalists get cash, the chance to intern at Microsoft Research, Lionhead or Rare Game studios, the chance to show off your game at the Game Developers Conference (GDC).
I was so stoked to see the last finalists' games. Even if you don't want money, glory, or a new job related to games, make this little pm happy over here in the blogosphere. I loved what people came up with that no one ever expected. They were very addicting. :)_
Live it vivid!