The long awaited XNA Game Studio and it’s XBOX 360 game launcher counterpart is available for download. Hobbyist game developers rejoice!
“XNA Game Studio Express enables hobbyists, academics, and small, independent game developers to easily create video games for Windows and the Xbox 360 console using new, optimized cross-platform gaming libraries based on .NET. This official release enables the creation of games for Windows XP SP2-based PCs. Combined with an active membership in the XNA Creators Club (available from Xbox Live Marketplace), you can also create, debug, and play games on your Xbox 360 console.”
Oh. You have to have Windows XP SP2 at the moment to run XNA Game Studio Express:
“Only supported on Microsoft® Windows® XP SP2 (all editions) at this time. Windows Vista support will be available in an update to version 1.0 next year.”
Source: XNA Game Studio Express Download