I want a proper count of how my story is spreading in social networks (or graphs). I would like facebook + twitter commenting. I would like it to spread among smaller or alternative social networks. I'd like it to be possible for people to be notified even if they are not in the posterous network. I'd like integration with other commenting systems. I'd like "likes" or something equivalent. I'd like posterous "retweets" or such within the posterous network.

I don't mean social as in posterous creating their own social network, that would be silly. I just want tighter and deeper integration with social collections, such that what I write can spread wider and be more appreciated.

Being able to embed and image in a post is not a feature I really appreciate much, since I know html and thus can solve it very quickly. But integrating deeply with other social networks is not something I'm familiar with, and having such features would be great for me.