According to some testers in Microsoft-centric forums, Windows 7 Build 7048 has been declared Release Candidate 1 ahead of the planned April 2009 launch date. For those racing through the torrent sites, it's build 6.1.7048.winmain_win7rc1.090211-1625.
This means win7rc1 was compiled at 4:25PM last Wednesday. Microsoft hasn't said anything official yet, so remember our first rule of rumours. If you find this in any Torrent tracker, proceed with caution: Only Build 7032 has been detected in the wild so far. [Softpedia]