MSDN support for TFS is ridiculous - it is essentially an automated dump of class structure with no information whatsoever. Shame on you TFS PMs/management for releasing a product with no documentation. I thought we were a developer-oriented company!
EDIT 3/12/09 This is no longer true - MSDN has pushed the new round of TFS docs and they are great. Excellent job!
Buck Hodges has a couple of great posts, however, that saved the day for me: