Well, it seems that the long awaited Windows 7 SP1 is finally showing.
The Windows 7 Beta SP1 has been leaked and is available to download in the usual areas soon.
The build currently in production is:
6.1.7601.16537.amd64fre.win7.100327-0053
According to Geeksmack the installation process is much more fluid and faster than the usual Service Pack.