Medieval Persian miniature.
Big things going down in Iran. As I write this, thousands have gathered in Tehran to an officially banned protest at which Mousavi and Khatami have called for new elections. There are reports of violence and apparently plainclothes police and Ahmadinejad supporters (there are a lot of them and they are thugs) have brutally beaten Mousavi supporters in the streets. Meanwhile, at 9:00 pm last night, Mousavi supporters registered their protest by shouting Allahu Akbar from the rooftops -- apparently something that was done in the 1979 revolution.
The supreme leader Ayatollah Ali Khamenei, apparently the person ultimately behind the election fraud (though some suggest it was orchestrated by more secular elements in the army and the police) initially declared Ahmadinejad the winner, but today he has agreed to look into allegations of voter fraud. This could either be a trick to lessen the intensity of the protests, or it could be evidence of disagreement within the clerical hierarchy.
People across the world have been asked to wear green today in support of the protesters.
The government successfully shut down Facebook and text-messaging, which have been powerful tools in organizing popular protests, so this time the revolution is on Twitter. There is an English language twitter feed you can check out (#iranelection). Andrew Sullivan is also following things closely, as are the Huffington Post and The Lede Blog at the NY Times.
Pray for the Iranian people.