Well, I sat on the plane reading "Wall Street Nerds," by David J . Leinweber. A pretty good collection of articles on history of AI applied to markets, written for the layman. A few good discussions on perils of curve fitting and mining for new traders as well. About the only technology he didn't seem to knock was GAs. Has anyone ever used QuantEx or MarketMind; some of the tools he co-developed and argued worked well in his book? What was your firsthand experience? Also, anyone using more modern AI based commercial tools at an institution or hedge fund?