Steven Bink reports the long awaited Virtual Server 2005 R2 is finally available for download in 180-days evaluation form: x86 Enteprise Edition.
Volume License and Software Assurance customers can also download it here.
Remember to also download the Updated Additions to better performances for Windows Server 2003 SP1.
MSDN versions should follow at short (Microsoft reported it should be available for middle December).
Beta testers should soon receive a letter with their Enterprise free copy as Microsoft promised.
Update: Microsoft just informed me that the evaluation product changed download location. I already updated the link.
As you can notice they removed the x64 Enteprise Edition trial availability.