What exactly are you watching on Twitter? Other than "There are riots in the Tehran over the election" what more is there to say right now? Anyone who is watching the situation knows the communication lines have been cut.
As for CNN they did report on it during their news casts. What else would you have them do? They have no footage (cameras are being confiscated), no direct communication with reporters and therefore no accurate information. So there's nothing really to report (other than people on Twitter who are either making things up or regurgitating news reports that repeat the same known facts over and over again)
Do you really want a media that reports on something even though they have no facts?
Last night it was #IranElection, the keyword "Mousavi", @Change_for_Iran, among several others.
Yes, there are rumors going around, but if you found the right users there were definitely people right there, standing on the streets. That strikes me as more credible than reporters which aren't necessarily getting the whole story, especially if foreign press is being asked to leave the country.
"Mackell says the crackdown on protests has also extended to journalists, making it almost impossible for the media to cover the story. "I saw yesterday a Japanese camera crew who have full government permission and were working with an approved government translator, still were beaten and arrested by the police for filming at a protest. That kind of thing is happening to a lot of people. Journalists are having their cameras taken." (http://www.cbsnews.com/stories/2009/06/14/world/main5087285....)
That's where Twitter -- as long as you're looking at people who are actually there -- comes in.
As for CNN they did report on it during their news casts. What else would you have them do? They have no footage (cameras are being confiscated), no direct communication with reporters and therefore no accurate information. So there's nothing really to report (other than people on Twitter who are either making things up or regurgitating news reports that repeat the same known facts over and over again)
Do you really want a media that reports on something even though they have no facts?