A comments page but also a newsfeed to track the comments happening.

It's a bit catchword-y, but I like the phrase "ambient social" to describe the appeal of Facebook in one key sense: it's not about directed conversations, it's about creating opportunities for conversations which other people might take you up on. I post a status not because I want to talk about myself, but because I'm sending out a feeler for if anybody else wants to begin a conversation. (Which is why Twitter doesn't appeal to me the same way: it's nowhere near as easy to track conversations.)