... for those who have heard of them/know what they are, what do you think of them? I've got access to them via ESPN Insider, and they are pretty interesting at first glance -- being a mathemetician and loving baseball's sabermetrics, this is right up my alley.
What do you think is the most valuable of these stats, and why?
Right now I'm judging various players' TS% against one another and coming up with some interesting results. I think this number could give a more accurate measure of, say, FG Rating in NBA Live; as I feel far too often big men are given too great of a FG Rating, and others given lower than they deserve. TS% takes Free Throws and 3-pointers into consideration with the formula, so some of that error is (theoretically) removed.