I think a useful product, TT, would be a super-massive dB of high entry SNGs, e.g., $100+. I think a lot of players would pay for this dB. I know a few people who make a good return specializing only in semi-expensive SNGs.

But your point is a good one. Pat at Pokertracker should develop a whole new set of statistics/metrics focusing only on SNGs. Most of the stats currently employed by PT are most applicable to cash games.