The shroud of secrecy is lifted:

After almost a year of hemming and hawing over how and when to acknowledge publicly its plans for Windows Vista Service Pack (SP) 1, Microsoft finally released on August 29 its officially-approved schedule and feature set for the awaited update.

Vista SP1 will go to about 10,000 to 15,000 selected beta testers by mid-September, officials said. The SP1 beta build will be made available to these testers for download form the Microsoft Connect site. A broader public beta of SP1 is likely around the time Microsoft delivers a release-candidate test build of the service pack, officials said, while declining to provide a timeframe for that build. The final