2007 is a mere 2 weeks old and yet it's been an interesting one so far for VSTS.  Brian Harry has been been a fountain of VSTS/TFS information over the last year and he continues in 2007.   Some specs for the upcoming version of VSTS are available as are improvements in work item perf in that release. 

Buck links to a useful article on working offline with TFS.

Here's a list of bugs that were fixed in VS 2005 SP1.

And last but not least, here the updated TFS install guide.