Brian has recently posted about a tool that he introduced to me way before we released TFS.  I found it immensely valuable to really get a handle on what was going on with our dogfood server and how much usage it had seen recently.  He's been plugging away at this for quite some time and it's really turned into quite a tool.  I'm excited to hear that he's considering publishing it as a Power Tool.  Judging by the response to his post on the topic, I'd say he's pretty likely to push hard in the next few months to get this out to folks.  Take a look and let him know what you think.