Actually, I was thinking about suggesting camera with recognition, hehe. My other thought was a trained monkey, or failing that, a trained person, which I suppose is still a trained monkey, just more expensive. :) Josh -- A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. -Douglas Adams Denny Esterline wrote: > Off the wall? You call that, off the wall? Satelite locator beacons with > GPS transponders? Camera and image recognition software? How about an armed > guard with an attack dog? Now that's off the wall. Although, considering > the price of those macadamia nuts it might be justified :o) -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu