Ok, this one is just for fun. Über Aharef has created a little application that converts any Web page into a colorful little graph.
It is totally useless, yet strangely amusing so obviously that makes it worth a look!
Another interesting thing is he provides the source code and if one were so inclined the code could be modified to make the graph dynamic and interactive. For example, clicking on one of the nodes could take you to another graph, or perhaps follow the link in question.