To be honest I think Fiat should of used the Punto to enter the US market rather then the 500 to go against the Ford Fiesta. Plus I still think they need to flesh out Chrysler's range of cars by merging it with Lancia's range. I think they would complement each other.
I just hope Fiat isn't going to turn around and leave because one car is not selling as much as they wanted it to.
Meanwhile here's Abarth's US website for the 500.