This article isn't notable for its content as much as for the evidence its presents about where social networks are in the media. I was a freshman in college when Facebook and MySpace came out, and to anyone my age, articles like this would have been passe two years ago. It's a little funny watching the rest of the world go through exactly the same little crazes (how many friends can I add today? what do I do if someone I don't like friends me?) that we went through back in 2004.
It's reminiscent of those articles from the late 90s explaining the various types of emoticons.