It doesn't quite map to any known mental model, though, because when someone replies to your post, it's broadcast to your friends instead of their friends. I th

It doesn't quite map to any known mental model, though, because when someone replies to your post, it's broadcast to your friends instead of their friends. I think this is potentially extremely confusing and weird. I think "Places" are a better metaphor: http://news.ycombinator.com/item?id=2714333 http://news.ycombinator.com/item?id=2714333