Sweet looking tool. Comes to me via a tweet by Chris Brogan.
You would be amazed by the number of new and useful links that come thru twitter people that you follow. I follow a number of marketing tweeple, some top web designers/standards people, technology gurus, a few famous people, along with some friends, and although it does suck time out of my day when I allow it, it is more productive than my previous second life addiction. Try it.