This is presuming you're one of those playing around with XNA Studio Homebrew for the PC or Xbox 360 - you will be interested to know that Microsoft has made an incremental update to Game Studio Express.  And the incremental doesn't even hit the version number: the update is known as "XNA Game Studio Express 1.0 Refresh."

Refresh adds Vista compatibility, and the XNA Packager, which allows users to share binary files for both Xbox 360 and PC homebrew games. Speaking of which, the 360 still needs the Creators' Club membership, no change there. Other changes include bitmap-based fonts and game packaging. Hit the Read link to Refresh your XNA Game Studio Express.