That's a good point. I was originally thinking more along the lines of a flat user model (e.g. any social news site), in which everyone contributes to the whole, rather than a relationship/network-based model, in which certain users interact with other users, but not necessarily the whole (e.g. Facebook, Myspace).
Yeah, I think there's a disconnect in our vocabulary here. I see them as User Generated News Sites which is a different mentality than Social Networking, which I assumed when I saw "social web app".
