Catalyst for Revolution?
It appears the Islamic Republic is running out of cards to play. As this Debka report
points out, Iran is reduced to two unpleasant choices, fully cooperating with IAEA inspectors and thus undermining the government's credibility with the people, or facing sanctions that may include a ban on sales of Iranian oil to any UN member state, which would hurt an already ailing economy and probably accelerate popular revolution.
Iran is not Iraq. There is a limit to how much force the government can hope to use to hold down the people and the conditions for popular uprising have been ripe for a long time now. They want their freedom and sooner or later they'll get it.