The Empress Farah Diba is still alive, as is the prince of the Pahlevi house. Constitutional monarchy would be an option.
Remember, one reason the Shah fell was that Khomeini's followers were always bitch, bitch, bitching about how cruel and mean the SAVAK agents were to them, and they raised a holy Islamic stink about unjust, non-Islamic rulership. At bottom, it was a big, fat moral complaint.
Now that Iranian society has had a good chance to see what the late Shah's detractors were made of, do you think they might be capable of weighing the old complaints about SAVAK against what the people targeted by SAVAK have done, once their hands were untied?
Maybe the Islamists just flat deserved to get the living snot kicked out of them -- maybe they were just that kind of people who need to be repressed as hard as possible, like LaRouchies, lest they come to power and unleash their pathetically diseased personalities on the rest of humanity.
It would be an interesting thing to let the Iranian people decide on their own.
lentulusgracchus,
The vanguard of the revolution in Iran will mainly be those born after 1979. (60% of Iranian population is under 30). So they are not likely to have any memories of the SAVAK and the Shah.
Iran is a very interesting case because their own version of “the Brotherhood” has been in power for 31 years. So regime change there will most definitely lead to a more secular regime.