Three days after a made-for-TV movie catapulted him to national fame, Portland's best-known door-to-door salesman, Bill Porter, has found himself knocking on doors at the rate of 80 per second. A nice pace for a 69-year-old man with cerebral palsy who overcame the label "unemployable" to become a top-grossing salesman. This week, following Sunday's premiere of the TV movie "Door to Door," Porter is getting 80 hits a second on his Web site, where he now sells Watkins household products. That's not all. The movie, starring Academy Award nominee William H. Macy as Porter, drew U.S. television's biggest audiences Sunday...