When I logged on to my desktop Twitter application (sad, I know) it was alive with Tweets about the earthquake in China. Most of them were from the celebrated technology blogger Robert Scoble, who is famous, perhaps notorious, for receiving a Twitter message every second of the day.
He is based in California, but thousands of miles away from the quake he was providing breaking news about it, linking to sites like the BBC and the New York Times, even providing a first picture - though how authentic that is remains to be seen. He now claims that Twitter had the breaking news even before the United States Geological Survey, which provides early warnings of seismic events.