https://www.diigo.com/user/kamichat/Influence%20CoolToolsScore = Interpret markers, this is a influence proxySay = Looking at topics and behaviorSee = Watching what people actually do, and how others behave in community
The ability to look at relationships by topic is coming, there are already lists that you can buy by topic through Tracckr, and Klout and others try hard through Topics.