Today the WSUS product group launched the WSUS 3.0 Service Pack 2 beta program over on our Connect site so if you want to get a head start on testing and evaluating this Service Pack then you'll want to make your way over there and download a copy today. WSUS 3.0 Service Pack 2 addresses a number of product features and fixes and includes the addition of support for Windows Server 2008 R2 and Windows 7. Just remember that you have to be a registered Connect user and logged in or you won't see the download being available.
The official Connect site where you can read the documentation and download your own copy of the beta is here:
The WSUS product team blog also has a nice write-up detailing our new OS support, feature improvements and fixes in the SP here: