http://blogs.technet.com/stbnewsbytes/archive/2007/09/24/windows-server-2008-rc0.aspxRelease Candidate (RC0) for Windows Server 2008 will be available for download within the next 24 hours. With this release, Microsoft’s partners and customers can download and experience a Community Technology Preview (CTP) of Windows Server virtualization.en-USCommunityServer 2.1 SP1 (Build: 61025.2)