http://blogs.technet.com/b/technet_flash_feed/archive/2011/02/22/get-windows-server-2008-r2-and-windows-7-sp1-now.aspxWindows Server 2008 R2 and Windows 7 with Service Pack 1 are ready with new virtualization tools, web resources, management enhancements, and Windows 7 integration. You can also evaluate the SP1 edition with the Windows Server 2008 R2 SP1 trial . Alsoen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)