Based on news from the MDL forums, Microsoft Windows 8 is currently rumored to be at build 8156.
The most recent builds allegedly include:
The latest build was allegedly completed on the 16th of November, 2011. The march toward CES 2012 continues and I fully expect that at some point in January 2012, we will see the Windows 8 Beta.
I’ll be in Vegas to cover Steve Ballmer’s speech from the press pool and will bring you the latest Windows 8 news from there.