Following months -- if not years -- of anticipation, Fiat is finally weeks away from reentering the U.S. market with its new 2012 Fiat 500. To help prepare consumers for the launch, its retro compact car, and expose buyers to the brand's Italian heritage, the automaker has launched a new wave of TV commercials.While Fiat plays up the 500's Italian heritage, the car has been modified for the North