according to this link i found the fiat 500 will be free from smog check. its not like it was going to have a hard time passing anyway. but this just means that it will be a little bit easier for you guys that buy one and live in california.
http://home.socalfiat500.com/post/1321326077/twin-air-exempt-from-smog-check
http://home.socalfiat500.com/post/1321326077/twin-air-exempt-from-smog-check