According to a Russian website winreview.ru, via win8beta.com, Microsoft compiled the build "Windows 8 Milestone 2: 6.2.79xx.0.winmain_win8m2.xxxxxx-xxxx" recently. News of this build comes just days before CES 2011, meaning Microsoft might have a sneak preview for a select few, but the chances are very unlikely.
http://www.neowin.net/news/windows-8...ready-compiled

Microsoft Chief Executive Steve Ballmer is expected to present a keynote speech at CES 2011 the night of January 5, showcasing the company's consumer technologies. Microsoft is also expected to hold a press conference that afternoon prior to Ballmer's speech. The new OS is expected to be revealed at either event.
http://www.tomshardware.com/news/Ste...sed,11882.html