Thanks for the quick overview. I also checked wikipedia.
I have used Facebook and LinkedIn for a few weeks.
I don’t see myself as being such a smart and interesting person, such that a lot of folks would want to know, moment to moment the answer to....
“....what are you doing?”
Like texting teenage girls.
It looks like we have reached a saturation point with this social networking capability, that it becomes ridiculous.
If the answer is “....I am riding in a cab with my friend Julie”...
then isn’t Julie interesting or important enough for your immediate attention?...
and similar feedback.
I picture busy politicos as TOO overwhelmed by information, to sit themselves and tweet, very much.
John McCain is not running again for Pres. He is having what fun he can, the remainder of his life.
He is entitled to tweet, twitter, or blackberry, or not—as he decides.