It's easy to get carried away, of course. I'm also on Twitter (what are you doing in 140 characters or less). A cousin is also on there, although most of his posts are work-related. You can follow anyone, unlike Facebook where you need to "confirm" the friendship connection. In this way, Twitter has a higher creepiness factor - I'm following people I've never met but only know from their professional work. You can block people, though, so it's not quite the stalking network you might think. The professional folk usually want a high number of followers, and tend to invite everyone. I'm even following the Library of Congress! Pres. Obama used it very effectively during his campaign to keep people informed of events.
Not all the younger generation is as excited: Jon-Erik is mortified that I'm using some of these social networking sites (he only made a Facebook page to humor me) and James-Philip didn't know what Facebook was until Sunday. So I guess I still know a little more than my kids.