Peggy Noonan is in fine form today:
She does a good job explaining the impact of Twitter:
A small point on the technological aspects of the Iranian situation. Some ask if the impact of the new technology is exaggerated. No. Twittering and YouTubing made the story take hold and take off. But did the technology create the rebellion? No, it encouraged what was there. If they Twittered and liveblogged the French Revolution, it still would have been the French Revolution: "this aft 3pm @ the bastille." It all still would have happened, perhaps with marginally greater support. Revolutions are revolutions and rebellions are rebellions; they don't work unless the people are for it. In Iran, Twitter reported and encouraged. But the conviction must be there to be encouraged.