I've spent a ridiculous amount of time this weekend on Facebook, having struck clusters of Rye Country Day School and Stanford friends. Psychologically it's interesting. Friendships that were once private or intimate are revived in public. I keep hearing "there is no privacy anymore," but I don't know that the person(a) that has no privacy ever existed before these tools existed.
In my day-to-day personal narrative my high school and college years, the separate circles of friends I had there, various work lives, and neigborhood friends do not sit juxtaposed. Even time shifts in the online world - of course my high school friends and my college friends are the same age, but it is strange to see us that way, all of us with gray hair or kids the same age or resumes that demonstrate about similar amounts of amassed experience and tag us as members of a particular generation.