http://blogs.technet.com/blogms/archive/2009/01/08/windows-7-public-beta-released.aspxThe beta version of Windows 7, Microsoft’s next-generation PC operating system is now available. Microsoft announced the news at the Consumer Electronic Show (CES) on January 7th 2009 in Las Vegas. Windows 7 Beta can be downloaded from MSDN, TechBetaen-USCommunityServer 2.1 SP1 (Build: 61025.2)