Virtual Server 2005 R2 Service Pack 1 (SP1) – Beta 1 now available
The service pack will add support for hardware-assisted virtualization, improved backup services and more. Beta 1, now available for download, contains support for Intel Virtualization Technology, as well as the Virtual Server host clustering step-by-step guide. Beta 2, scheduled for Q4 of this calendar year, will include Beta 1 features plus support for AMD Virtualization, Volume Shadow Service support, Active Directory integration and expanded OS support.
You can download the Service Pack 1 Beta 1 from Microsoft Connect. (registration required)