in the movie a reporter was hassling the "producer" with the same question. he ended up saying "argo and get stuffed"
which became a running joke.
the movie is very loosely based on what is known as the canadian caper in which some american diplomats, who escaped from the american embassy in Iran when the mentals stormed it and took a heap of hostages in 1979, were smuggled out of iran.
typical hollywood liberties are taken with the facts to make the yanks feel good about themselves, but as daniel says, it is a pretty enjoyable film.
if you watch it you will find out why the name argo, but it has nothing directly to do with jason and his boat.
visit the pirate bay if you know how to use torrents