There have been many reports of Iranian protesters using Twitter to communicate, and the people who run Twitter are apparently very aware of it. Do you think the founders of Twitter ever thought they would have a press release like that?
UPDATE: From technology invented in 2006 to some that dates to 1843. University of Chicago students have set up a fax number for Iranians to get messages out of the country, since cell phones and internet have been blocked by the government. Nothing is posted yet, but it's worth watching. At this rate, they'll be reduced to letters carried on horseback by the weekend.