Finally... Windows 7 client and Windows Server 2008 R2, and Windows Server 2008 R2 Hyper-V standalone are RTM

TRUE!!!
Finally Windows 7 and Windows 2008 R2 are RTM’d...
Congratulations Microsoft.

Read more:
Windows Server 2008 R2 Reaches the RTM Milestone
Windows 7 Has Been Released to Manufacturing
And also the new features of Hyper-V
Windows Server 2008 R2 & Hyper-V Server 2008 R2 RTM!!!!

Check this post to get some official dates.