I was a skeptic about the usefulness of Twitter for a long time. I still think it creates a whole load of "noise" which isn't particularly useful and as for Twitter's business model, well, they don't have one.
Last night I was online with TweetDeck open and I started to get messages about the plane crash in NYC. The tweets came in fast and furious and included everything from pictures to live video feeds. 20 minutes later I got an e-mail alert from the New York Times. So, here's something useful about Twitter - it seriously beat what is probably the leading newspaper in the world to the news.
Ok, maybe I was wrong about it after all. Now, if only people would stop sending pointless tweets the noise volume could be reduced!