I noticed an item on the XNA team blog that was posted today, and I wanted to link to it here as well. There will be a beta version of XNA Game Studio 2.0 available for download in the near future. You can check out the entire post here - http://blogs.msdn.com/xna/archive/2007/11/15/xna-game-studio-2-0-beta-available-soon.aspx.
This beta will integrate into Visual C# Express 2005 and Visual Studio 2005 standard and higher, and the beta will only support deploying Windows games. If you are interested in checking out the XNA Game Studio 2.0 beta, make sure to check back for updates on the XNA team blog. Also, you can check out this blog post for more information about some of the key new features that will be available in XNA Game Studio 2.0.