As far as I know, there is no independent press to speak of at all in Libya, Saudi Arabia, and Tunisia, whereas there exist many in Iran, in print and online, some of which you can read if you can read Farsi: e.g., <http://www.zanan.co.ir/>.
As for jail time, many other countries in the Middle East, as well as elsewhere, jail more journalists than Iran, as you can see <http://www.rsf.org/article.php3?id_article=16088> <http://www.rsf.org/rubrique.php3?id_rubrique=116>.
Only following Washington's priority can one believe that Iran is the worst place for journalism in the Middle East or the fourth worst place in the world.
-- Yoshie <http://montages.blogspot.com/> <http://mrzine.org> <http://monthlyreview.org/>