Brian Harry has blogged all the details, so I won't repeat them all here. 

In particular, I know several of you have been pinging us for tool to configure 64-bit Sharepoint for TFS 2008, so, you'll be happy to know that this has been included as a separate download in this Power Tools release. 

Another highlight in this release is a new TFSServerManager client - a convenient app for monitoring what's going on with your TFS server.