Or whatever the hell Robert Redford was wearing in that scene of Sneekers. Not creeped out enough by commercial surveillance and psychological exploitation? Well don't worry, Wal-mart's got something else they can try. How about using infrared sensors to track customer movement and correlate it to sales. Or effectiveness of not only item placement, but advertising and promotions. Yeah, just put that on my list of reasons I'm glad I don't go to Wal-mart. Seriously. Ever. Although it would interest me a little if we could figure out how the system ran and walked around in specific patterns just to fuck with them. Or reshelving merchandise so that they think people are getting dental hygiene supplies instead of chips.