Twitter is supposedly one of the next big things.
It's basically about writing frequent short sentences rather than lengthy blog entries. No time for that.
But isn't more time consuming to constantly write updates ?
I guess in a sense is more "social" than blogs, because it's less like a monologue and more like an entry for a possible conversation. But social stuff on the web is risky. Things like Facebook can get pretty heavy.
My policy is that if someone is explicitly interested in what I say, he or she can check my blog by directly coming to this page or hooking to the RSS feed... but things like Facebook, they put everyone aware of everybody else's moves. It's too easy to become "friends" and then one has to start worrying about about anything written, photos posted, because everyone wil passively follow you.
Social sites are really too much of a good thing.