Volkswagen of America, Auburn Hills, Mich., has a new spokesman: classic cartoon character Speed Racer. The 1960s' race car driver makes his debut for VW during the Olympics on NBC this Sunday in a new, animated 30-second spot from Arnold Communications, Boston. Speed Racer zooms in a VW GTI to victory after his traditional Mach 5 ride is sabatoged. VW bought forty 30-second ads during the Games. Other current VW ads will also run.