Joe Polish?s Tempe, Arizona office, headquarters for Piranha Marketing, is oftenreferred to by marketing insiders as ?action central? for much of the entrepreneurialworld. Though he made his fortune in an almost invisible niche by telling carpetcleaners how to crush the competition and turn their small local businesses intomoney-churning machines, he is now among the most well-known, respected,?complete marketing geniuses? in the world.