Arstechnica has a nice screen shot of the beta on MSDN thanks to Googles Cache. If this screen shot is to be believed then the recently torrented Windows 7 beta is the official beta. It wouldn’t surprise me though if Microsoft delayed the release of the beta to official testers just so they could re-build it and give it a new release number just to differentiate it from the torrented beta.

MSDN

Check It Out> Arstechnica