You don't understand Twitter!
That's OK. It's kind of weird and hard to get your head round. And if you aren't using Twitter, absolutely there is no way you're going to understand it. It looks ridiculous; the most pointless thing ever,
But the hype is justified. Twitter is unlike anything else out there. A kind of Flow Internet version of del.icio.us. The most successful example of Zby's "social routing" I've seen. The nearest thing to plugging yourself live into massively parallel hive-mind.
Update : Big Scribe post on Twitter today.