See "Freedom craving 'fuelling Iran unrest'"
Iran today is a revolution in search of its Yeltsin. Without leadership, demonstrators will take to the street only so many times to face tear gas, batons and bullets. They need a leader like Boris Yeltsin: a former establishment figure with newly revolutionary credentials and legitimacy, who stands on a tank and gives the opposition direction by calling for the unthinkable -- the abolition of the old political order.
--More in Charles Krauthammer's excellent article "What Will Mousavi Do Next?"