I have been thinking a little bit about Twitter. (Here I sway by some members of my online quietest faction.) No need getting into the details of the software, but my first impressions are positive.

The technology constraints each message broadcast to 140 characters. That is the part that I like. You can broadcast from your phone, instant messaging client or browser. I like that, too. What I dislike is its regulative suggestion that each message should be an answer to the question, 'What are you doing?'. How contrived! The quantitative constraint is enough! Why impose a qualitative constraint, too?