Busy week for Microsoft.   They have hit milestones on 2 products that directly affect the Virtualization/sbc world.

First Windows server 2008 R2 hit RTM.
Windows 2008 R2
Second windows 7 has hit RTM as well
Windows 7

Interesting note for Windows 2008 R2.  It is 64-bit only.  That has a pretty serious effect on Citix/terminal services users. 64 bit only has some serious print driver compatibility issues.