If you're curious about the dynamics and actors in the drama, go read this:

[TEHRAN BUREAU] The rigged presidential election in Iran - a coup d'etat, according to Mohsen Makhmalbaf, a spokesman for the main reformist challenger Mir Hossein Mousavi and other analysts - has prompted protests both inside and outside Iran. There is, however, little understanding about the ideology and motivation behind the operation.

Along with Twitterfall (looking at #iranelections, #g88, #iran9), Tehran Bureau is a site that I've been reading compulsively for the last three days...
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