Mock not. As the regime shut down other forms of communication, Twitter survived. With some remarkable results. Those rooftop chants that were becoming deafening in Tehran? A few hours ago, this concept of resistance was spread by a twitter message. Here's the Twitter from a Moussavi supporter:

ALL internet & mobile networks are cut. We ask everyone in Tehran to go onto their rooftops and shout ALAHO AKBAR in protest #IranElection

That a new information technology could be improvised for this purpose so swiftly is a sign of the times. It reveals in Iran what the Obama campaign revealed in the United States. You cannot stop people any longer. You cannot control them any longer. They can bypass your established media; they can broadcast to one another; they can organize as never before.

It's increasingly clear that Ahmadinejad and the old guard mullahs were caught off-guard by this technology and how it helped galvanize the opposition movement in the last few weeks. That's why they didn't see what those of us surgically attached to modems could spot a mile away: something was happening in Iran. If Drum is right, the mullahs believed their own propaganda about victory until reality hit them so hard so fast, they miscalculated badly and over-reached.