In just about a month, testers will be getting their hands on Service Pack 1, to hopefully find and squash those nasty bugs before the rest of us have to download and install it ourselves. The pack breaks fixes out into three categories: quality improvements, administrative improvements, and support for emerging technologies and standards. The first will be most appreciated by the average user, while the last two are more for IT professionals and coders.
BetaNews has a preliminary list of the fixes Microsoft is planning for SP1. If you're wondering what Microsoft has up its sleeve for Vista, hit the link below for all the gory details.