I love Twitter. Its a great communication medium for everything from the serious to mundane. Best of all, it doesn't take much time to blast out a short message and read someone else's message stream. With that said, it's pretty addictive. Follow me!
I found a great site which creates an interactive map, or Mention Map, of some people and trends that I interact with on twitter. The best feature is that if you click on a person that's linked to me, then you can see all of the other people linked to the first person.
I've embedded the image below - if you can't see it, please click here.