Object Model of a Social Network

Question

Where can i find resources that describes the strategies and patterns of design of social networks object models? For examples, how to implement relationships between users, how to implement the stream of notifications of user actions, how to filter that stream for each user, etc...?

Answer 1

This focuses more on the high level view of social networks and internet communities but also from a software point of view, Clay Shirky's "Here Comes Everybody", Jeff Attwood (one of the founders of this site) has blogged about him in the past.