As Microsoft officials promised, the company has released this week to the general public the near-final Release Candidate test bits for Windows Vista Service Pack 2 (SP2) and Windows Server 2008 SP2.
The SP2 RC bits can be downloaded from Microsoft's Download Center.
As Neowin notes, the Microsoft Web page still says the new bits are the beta bits. But they are actually the RC ones.
The final SP2 builds are widely expected to be out in April 2009.