Very interesting article in Slate on how teenagers are increasingly abandoning email.
Excerpt-
"Let's think about this from a teenager's perspective. First, you'd never send an e-mail to 200 friends saying, "It's Friday and I'm ready to party!!!" But with a Twitter tweet or a Facebook status update, you can broadcast such a message to all of your buddies without seeming like a total dweeb. Need to make your party plans for Friday night? You'd be a fool to send an e-mail and twiddle your thumbs waiting for responses; it's speedier to exchange IMs with your friends. If you then need to tell those friends how awesome they are for joining you, post a message on their Facebook or MySpace page so the world can see. And mobile phones take instant—and constant—contact into a whole other realm. You can argue with your girlfriend all night without having to leave the party. Then, the next morning, you can change your Facebook relationship status to "single." And there you have it—a whole weekend of social drama lived and publicized without a single e-mail."