That's true, but we get so many Twitter articles posted in here, that it must be important. I am trying to understand why do some people feel it is important, and how it is useful to them.
People like it because it's blogging but with a captive audience, and the 140-character limit keeps you from writing Steve Yegge-style blog posts. You make a point, your friends are forced to read it, they can reply. That's twitter :)
