I almost bought ticket for Tehran to be there at 11 February for 7 days. But I checked website of Iranian Ministry of Foreign Affairs and it looks that there is NO MORE 7-14 days airport visa!!! Is it fact? Does anybody get airport visa these days?
The visa on arrival is still issued for the 98 nationalities. If your nationality is among the countries authorized to get a 30-day on arrival visa (except USA, England, Canada, Colombia, Pakistan, Afghanistan, Iraq, Jordan, Bangladesh, and Somalia) you can easily collect your visa against offering your passport, a passport-size photo and about $50 to the staff at the airport.
for more information check: Iran visa.