BTW--I had read about this the first day. Totally awesome...Gamers FTW!
I worked for an attorney/owner of a business once and they spent two years trying to develop a consistent, impartial system to rate risk/benefit values for customers and could not find a way to keep evaluator employs from injecting bias. I spent a weekend developing a "game" approach that would make people "play the game by the rules" and Monday morning the owner almost fell out of his chair and they implemented it immediately. At the time, I was a temp employ hired to answer phones for six weeks.
Gamers will save the world one day...that Ender guy ya know.