SocialNetworkingSoftware stores a database of connections between nodes.
Wiki is a data-base of connections between nodes.
Is there anything in this isomophism? How might they be the same? Would you implement social networking in wiki? How? Why?
person per page. Represent person's data with FriendOfAFriend?
You store the edits of each page. You can see who has worked on what pages. What if you connected people according to whether they'd worked on the same page? What if, in TypedThreadedDiscussion you connected people who replied to each other's posts. Who tended to agree or disagree with each other?