The Windows 8 beta blog reports that the latest Windows 8 build is 8006

We have earlier reported that the latest build compiled is build 8005, today twitter user MSFTtm has tweeted that the latest build compiled is build 8006. The build string of this build is 6.2.8006.0.winmain.110513-1855 which states that the build was compiled on May 13.It’s quite obvious that a new build is compiled each day except the holidays.

  Windows 8 latest build, build 8006