From Jewbonics: hundreds of thousands–perhaps millions–of Iranian Mousavi supporters are out in the street, agitating for reform. They are politicized. They think their votes weren’t counted. They know that they are banned from demonstrating. And they know that the Islamic Republic has authorized the use of live ammunition (there have already been civilian deaths, which may lead to further strengthening of the movement).
An energized populace in Iran, willing to defy illegitimate state edicts, can only lead to good, fraud or no fraud.