This free service pack adds 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. To download SP1 Beta 1, select the Virtual Server 2005 R2 SP1 Beta program from the list of available programs that appear here (registration required).