On the mechanics side of thing, when I view the demo (using Opera 11), mousing over the average score bar next to names makes the horizontal black bar flicker a lot, which is really jarring.
The first graph actually seems redundant in light of the table with the names, average scores, and best areas; the table is the best display for me since all of the information is right there and easy to read. I kind of wish that instead of the bar graph, the pentagram were displayed above the table so that I could mouse over names and see the pentagram change, or select two (or more) people to have overlapping pentagrams for easy visual comparison.
The review matrix display seems slightly awkward because of the horizontal scroll.
Overall, this seems like a very useful tool!
Edit: The about page is really cluttered with lots of duplicate data...