IntelliJ IDEA integration with TFS coming!
I'm about a month behind on this one, but based on their technology roadmap, TFS integration is on the way!
Team Foundation Server
A plugin supporting the version control features of Microsoft Team Foundation Server is currently in development. It is planned to be released for both IDEA 7 and 8.
Yay! I used IDEA for a long time and really loved it. I'm very happy to see this!