ReadWriteWeb: Twitter Topic Trackers (try saying THAT 3 times fast! ^_^)

I found this fascinating quote today:

For a service that simply takes 140 characters of input and then blasts them out in front of potentially hundreds of thousands of readers at a time, there has been a lot of work by people and businesses to figure out the best way to re-interpret and re-group Twitter posts in to meaningful categories, trends and threads.readwriteweb, ReadWriteWeb, Apr 2009

You should read the whole article.