David Hegarty passed Say Everything, an article from NY Mag written by Emily Nussbaum, on to me when we were at Kellogg together. Since reading it, I've gone back and read it again a couple times. It's been the single most important article I've read in the last year or so and continues to shape my thinking of the Internet.
It got me to start blogging, it led to trying out Facebook, then Twitter, and whenever I try a new Internet service, I think about this article.
Privacy is a complex issue and I have very few answers, but I know that blogging, twittering, etc pays back again and again for me. I think these teens and people in their early 20's are onto something.