An interesting visualization of the tweets surrounding the Egyptian revolution shows what a tangled web microblogging weaves.
If you're wondering just how many people were paying attention to Egypt on February 11, the day autocratic President Hosni Mubarak resigned from office, look no further than this video:
This is a preliminary result of the network of [tweets and retweets] with the hashtag #jan25 on February 11, 2011, at the time of the announcement of Mubarak’s resignation. If you retweeted someone, or have been retweeted, it is possible that your username is one of these tiny points.\n
From now on, make no mistake about how far revolutions (and Twitter) can reach, not to mention how quickly—all of these tweets, which only represent 10 percent of how many there actually were, were collected in a single hour.