I dont think they have released a Date for the Abarth 500 stateside yet, which is a shame because i think it would be just as popular as in the UK.
Im sure you are aware but the names are an indication of trim level.
As far as i am aware in the UK it go's as follows. Somebody please correct me if im wrong.
Pop is the base level which comes with 15" Steel wheels, Radio MP3 Player and no Air con (i doubt they will have no aircon models in the USA)
Lounge is the next level which comes with 15" Alloys, Blue & Me, Air Con, Chrome Detailing and Chrome Exhaust tip, Leather Steering wheel and Audio Controls.
The Sport is the Highest normal level which has all of the above with Sportier wheels and body Kit.