From Microsoft...

You may have seen some of the recent news articles that have started to roll out around the RTM and General availability dates of Windows 7. As Windows Server 2008 R2 is a joint development effort with Windows 7 we are aligned with the same RTM and General Availability (GA) dates.

With that – Windows Server 2008 R2  RTM code is on track to be available to our partners sometime in the 2nd half of July. Windows Server 2008 R2 will also be broadly available about the same time as the Windows 7 GA date of Oct 22.

Nice!