XNA Game Studio 3.0 Beta is GO!

That's right! You can download it now! We'll be asking your help to put this baby through her paces as we lead up to the official release later this year. It is your input that makes us stronger, faster and better. Download XNA Game Studio 3.0 Beta at Launch Center
If you do find any bugs or just have a suggestion on ways we can make XNA Game Studio 3.0 more awesome head over to Microsoft Connect to submit them to us.
Continue At Source
Reference : http://blogs.msdn.com/xna/archive/2008/09/16/xna-game-studio-3-0-beta-is-go.aspx