Microsoft has updated its 'make your own Xbox game' Xna Game Studio.
Here's what is been told about the additions:
" * XNA Game Studio 2.0 works in all versions of Visual Studio 2005. This includes Standard and Professional, as well as many other specific editions.
* The new and improved interface makes it easier for you to manage your Xbox 360 console.
* You'll find that managing and building content is easier and more consistent in XNA Game Studio.
* Microsoft have included project templates for content importers and processors.
* You can configure how content is processed with the new ability to set parameters on Content Processors."