Just saw this on the internal VSTS alias!
"The Team Foundation Server Release Candidate bits including upgrade utilities are now available for download available
from the MSDN Subscriber Download site: http://msdn.microsoft.com/subscriptions/.
To upgrade from Beta3 Refresh to RTM, please follow these steps:
Backup your server and copy the data to a safe location (that should be a no-brainer).
Download the Team Foundation Server RC from
Download the Upgrade Utility.
Uninstall Team Foundation Server Beta 3 Refresh.
Follow the upgrade instructions, which are included with the Upgrade Utility.
Install Team Foundation Server RC.
Complete the post install upgrade instructions, which are included with the Upgrade Utility.
For a reference to the major changes since Beta3 refresh, please see Jeff's blog. "
Congratulations to everyone involved in this tremendous effort!