vista-sp1-thumb-thumbToday Microsoft release the Beta version of windows Vista Service Pack 1 (SP1) to a private group of Beta testers via

Microsoft also released five reliability packages via for testing by selected members of the community.  These packages consist of numerous improvements to Windows Vista based on user feedback, and while they will also ultimately be part of SP1, Microsoft would be working to make them available before the final version of SP1 is released so that the Windows Vista experience is the best they can make it.  But for now, they’re still undergoing testing and will come your way once they’re ready for prime time.So hope to see these five reliability packages soon incorporated in Windows Vista SP1.

Unfortunately, the Vista SP1 is not public yet, but I suspect they will do a preview soon.