Hi Michael, I very much appreciate your suggestion. We've given a lot of thought to DNA and how it can help build the family tree of the world more accurately and faster. FamilyTreeDNA and Sorenson provide great services in this area and we're figuring out the best way to incorporate DNA into our tree to provide a kind of scaffolding in addition to linking people together that otherwise wouldn't have been known to be immediately related.
The idea of tracking results from other DNA services and incorporating that into our tree is definitely appealing. It helps you track and visualize all of the matches, contact people easily and see the matches in the context of our overall tree (you have the same maternal ancestor as Britney Spears). Additionally, it helps build the overall tree.