Twitter Needs an Elevator Pitch

Now that I’m using Twitter, I’m having the damnedest time explaining it to anyone else. When I describe it, I always get blank stares followed by “I don’t get it.” What I need is a short description (Tweet length of less) that describes the real value of Twitter. This seems so easy for other technology:

  • Email - send letters and messages around the world, instantaneously, and for free
  • Instant Messaging - real time online conversations
  • SMS - send a short message to any cell phone owner without worrying about where they are, what they’re doing, or if you are interrupting them
  • Facebook - easily keep track of old and new friends
  • Hulu - quality TV online when I want it

I could go on, but I think you get the idea. What do I say for Twitter? “like SMS but mass broadcast?” “short conversations with anyone?” “status updates for all your friends?” “like a chat room on the web?” I’m drawing a blank, but any ideas would help. How do I pitch Twitter to a non-user?