I wasn't sure about the whole Twitter thing at first. I am not usually an early adopter of technology, so it was kind of strange for me to be using something that is basically cutting edge. However, someone saw yesterday's Twitter message and hit me on the IM to express concern about my general well being. (I'm fine by the way) Why is the IM follow up relevant? It immediately demnonstrates the possibilities.
Imagine you are waiting for some very important news and by proxy your entire support structure both on and offline are waiting. The news arrives, positive or negative, and you tweet it out to everyone who follows you. (presumably the aforementioned human support structure) All around the world, people's mobile phones, e-mails, and or personal Twitter feeds go off letting them know that everything is ok... or not. It is a powerful communication tool that is just scratching the surface of its capabilities.
No 1 of Consequence