According to the information available the latest build compiled is Windows 7 build 7268 whose build string is 6.1.7268.0.win7_rtm.090701-1900 and the build was compiled on 1st July.
Other build compiled recently are
6.1.7264.0.win7_rtm.090622-1900 Leaked Real
6.1.7265.0.win7_rtm.090624-1905 Reported to have been Leaked
6.1.7266.0.win7_rtm.090626-1902 No Reports of Leakage
6.1.7267.0.win7_rtm.090629-1952 No Reports of Leakage
6.1.7268.0.win7_rtm.090701-1900 Reports dating back to 6.6.09 of being Leaked Confirmed FAKE!
Even a new build has been compiled in the winmain_sp branch, build string being 6.1.7234.0.winmain_sp.090701-2012 which was also compiled on 1st July.