What are you doing?
That's the question you'll be asked at Twitter.
Perhaps it doesn't sound very useful at first. That could be, as they say in Washington, DC, "a failure of imagination." Twitter might seem a little like a toy, at first. But I suspect it will soon rival - even surpass - Facebook in popularity.
The genius of Twitter is in its simplicity. You sign up for an account (free of charge). Then you can send and/or receive short text messages (either on the web or your phone). Your choice. You can even add the Twitter application on Facebook and permit your Twitter messages to update your Facebook status. If you're feeling really creative, you can tweet photos.
Once you've registered, you can follow me on Twitter. Or any one of some very cool people, like Toby Mac or Rebecca St. James or Gov. Mike Huckabee, to name just a few.
You only get 140 characters for each message, so be pithy.
Here's a good video that explains Twitter quite well. Happy tweeting!