Russian website Wzor indicates that Microsoft is currently up to Windows 7 SP1 Build 7601.16518.100302-1530, the last Build compiled in early March 2010 in the winmain_sp branch. At the same time, 7601.16502.100208-1500 is mentioned among the Builds compiled in February 2010, and now screenshots allegedly from the release have been leaked.

http://news.softpedia.com/images/new...eenshots-3.jpg

http://news.softpedia.com/images/new...eenshots-5.jpg

More details here.

Code:
http://news.softpedia.com/news/Windows-7-SP1-Build-7601-16502-100208-1500-Leaked-Screenshots-136732.shtml