The hardest part of Twitter is explaining it to people. IM on steroids is the best I've heard to date. But it doesn't do Twitter justice.
Abbie Lundberg, editor of CIO magazine, does one of the better jobs describing her fascination with it and how it works with a demo of how she was able to reach out to a small community and gather info. (See her blog posting here.)
A few tidbits:
If you're into fully articulated thoughts, Twitter may not be for you. But if you're a CIO or any other busy professional, having a tool that quickly and simply aggregates immediate information is a wonderful thing.Abbie also points to this post from Harry McCracken at PC World which describes Twitter's practicality pretty well. Harry points out some useful tips as well. (Click here for full article.)