Microsoft has released a beta version of Microsoft XNA Game Studio Express 2.0
>> Microsoft XNA Game Studio Express 2.0 Beta
Microsoft XNA Game Studio is a revolutionary toolset and technology which makes creating great video games for Windows-based PC's and the Xbox 360 console (with an active XNA Creators Club subscription) easier than ever. This release represents the beta of Microsoft XNA Game Studio 2.0.
>> Microsoft XNA Game Studio Express 2.0 Beta