George Van Antwerp posted a positive review for this site, Vitals.com, and I have to agree with him. I looked up some of the physicians I had worked with in the past and found out more about them than I ever knew before. It was startling at first to see their age, years of experience, and where they went to college. Then I started thinking about the ever-steady finding that more experienced physicians are simply better practitioners, so why shouldn't patients be aware of these characteristics?
Anyway, overall the site is really user-friendly. You can find a doc, figure out who to see for your problem and even rate the physician after your visit. Now it just needs critical mass.