I use friend modifier as a filtering tool: friends has +2 modifier points and friends of my friends has +1 modifier point.
This way I can elevate people who had imho interesting comments or articles.
I has too little spare time to write a program that could create a map of the social network of friends and foes.
It could have a default to find the tops: the most popular/hated person(s) and the person(s) who got most fans/freaks.
It could have another option to map the relations of a specific user.
Creating a visual output as a speudo-map in html as a platform-independent program would be nice.