I normally don't just post links to another post but this post by Brian Harry really got me excited about TFS 2010.  It appears Microsoft has addressed almost every limitation of the TFS 2008 installation and configuration.  He explains all of the components of TFS and provides some great screenshots.  Check it out!

http://blogs.msdn.com/bharry/archive/2009/04/30/tfs-2010-admin-operations-setup-improvements.aspx

Mike