I'm Free!:
Virtual Server 2005 R2 Enterprise Edition for Free
The full software for 32-bit and 64-bit versions is available as a free download !!!
This is the full Virtual Server 2005 R2 Enterprise edition available in both 32-bit and 64-bit versions. This is not a trial or limited version !
Virtual machines created today with Virtual Server will be able to migrate into our hyper visor based Windows virtualization.
http://www.microsoft.com/windowsserversystem/virtualserver/software/default.mspx