I'm a big fan of the work item tracking features in TFS since I use them (and the resulting data in for reports) on a daily basis.  Because of this, I was excited to see that Siddharth and Ameya have made initial posts to a new blog focused just on these topics.  It looks like there are plans for others from the team to help out as well so I'm counting on this to be a good resource for both myself and our customers in general.  Check it out!