My comment I posted on this piece by Burt Helm:
Twitter may not be of use to everyone and -- since it truly opens up for you once you learn how you can best use it for your goals -- it may not be for people who aren't inclined to put in the effort, or for those who have no goals.
It's changed my life positively in many ways and I'm no faddish fool. I look forward to it continuing in this form or another.