It's about time that the Iranian people are motivated enough to give a damn about their future, rather than silently resenting the government. The polls were obviously rigged, and the government's nationwide communications blackout gives it away completely.
The way that I see it, if enough people rise up and protest, and if the government attempts to suppress them with enough brutal and blatant violence, then they'll have enough international pressure on their ass to submit, though that seems extremely unlikely.
Even if violent revolution does happen to overthrow the government, another authoritarian junta will just prop itself up to replace it. Iran has always had some asshat in power, either secular or theocratic.