Brian Harry has a great post with all the links you will need to download the latest bits for VS2K8 beta2.  Also, in this related post he lists some of the nice features they've added to TFS 2008.  One interesting thing about the "new" TFS options is the VSTS Web Access (aka TeamPlain) that they're planning to release here shortly (Yes, it works both for TFS 2005 & 2008).