Please note that this project will not be continuing. With the release of of the Architecture Explorer Work Item Extension for Visual Studio 2012 Ultimate, I will be focusing more of my effort there. Please give it a try, it's available on
Visual Studio Gallery.
There are two major reasons for this switch. First, I was able to write the add-in with less than 350 lines of code. Second, it runs about a thousand times faster since I don't have to create the entire tree at once - you can now walk the tree for any path you want.
Project DescriptionUse DGML to visualize and analyze your TFS Work Items. Included is the ability to perform basic risk/impact analysis. It helps answer the question, "if I change this requirement, what is my potential impact to other requirements?"
Full documentation is available on the
Documentation page here and I will be adding a more in-depth description of how this tool works from a technical standpoint. I will also document the list of known issues (there are a few that are mostly UI issues rather than functional issues at this point).

Additional Screenshots:
State VisualizationWork Item VisualizationDependency Analysis