Huh!

Touchgraph's "Google Browser" is interesting, if a little confusing at first. Enter a URL & it displays a graphic rendering of website "relatedness" (i.e. "people who read this site tend to read that site...people who link to this site tend to link to that site").



You can even double click a node to add all of their links to the graph, making things even more confusing than they were initially.
Check it out Here.