Jeff Beehler has noted on his blog that they have handed over a cut of Team Foundation Server RC for upload to MSDN. Hopefully the gear should turn up on Tuesday (but hopefully someone does us all a favorite and does it early!).
As we near the release of TFS configuration managers should be starting to make migration plans for their BETA 3 databases. Depending on how desperate you are for the upgrade and whether you want to do a double hop to RC and then to RTM then you may opt to test this build on a VPC and then upgrade to the real thing in March.