Here is the official documentation of windows 7sp1 and win2008 sp1 from ms
The following documentation for Windows 7 and Windows Server 2008 R2 Service Pack 1 is provided here.
navigate to this site to download Download details: Documentation for Windows 7 and Windows Server 2008 R2 Service Pack 1 (KB976932)
by the way sp1 is gonna hit the download servers very soon