Ann Light from usability news points us to a piece by Web Informant:

Web Informant #380 suggests that "Social networking may be the next social disease". David Strom brings his personal take to the phenomenon of social networking and says a few thought-provoking things on the way. Some people will find his personal ramblings more annoying than informative, but regarded as a user reflecting on being confronted with those networking tools like Orkut, he's fascinating and articulate...

Our own holidaying Lee posted earlier messages in this context:
Who do you know? (see also related items on that page).