To choose the Top Ten Most Powerful Tweets, the Twitter team reviewed Tweets, news stories and international events from the past year. With more than 25 billion Tweets sent in 2010, narrowing the list to just ten Tweets was a huge challenge. The final selections represent the dynamic ways that people use Twitter in the political world, for disaster relief, and to add commentary to news events, sports and entertainment.http://yearinreview.twitter.com/powerful-tweets/
International relations, disaster relief, life and death rescue, Ecuador declaring a state of emergency via Twitter. This is really unprecedented stuff.