I'm not sure if I grasp the full intent of this tool, but it's fun to look at for a short while. The tool give the user a great way to visualize information. A good example of it's use is presented by
Friendster.com - "TouchGraph is perfect for exploring social networks because one can naturally follow friendship links while seeing the big picture of the social fabric."
Anyway, type in your keyword or site and have a ball...
TouchGraph for Google