Thaddeus Clark, of the amazing Melatone Music blog and record label, writes "The 3 Most Compelling Reasons to Twitter," which to me is the best compilation and description of why Twitter has the potential to be an interesting communications medium.
Number two for Thaddeus: "You can use Twitter for making the liner notes of your life."
He includes this example:
"[H]earing that "polyphonic spree just covered smells like teen spirit. everyone went insane" or "Enjoying my last barbecue of the summer and dreaming of all autumn has to offer" isn't so bad, is it?"Kind of says it all, in a way.