Windows Server 2012 RC and Window 8 Release Preview are now available - Plus VS 2012
Time to start burning through bandwidth.
Latest pre release versions are now available
Windows 8 Release Preview http://windows.microsoft.com/en-US/windows-8/download
Windows Server 2012 Release Candidate http://technet.microsoft.com/en-us/evalcenter/hh670538.aspx
First found via http://msmvps.com/blogs/bradley/
Also Visual Studio 2012 Release Candidate is also available. http://www.microsoft.com/visualstudio/11/en-us