Service Pack 2 Beta for Windows Vista and Windows Server 2008 Released To Testers
Not trying to violate any NDAs here, but in all the hubub around Windows 7 and PDC, it looks like Microsoft tried to slip this under the radar. If you were invited to the SP2 beta program, the downloads have been posted to Connect. So if you can pry yourself away from Windows 7 long enough, get downloading those bits!