Facebook Friend Wheel
I recently added the 'Friend Wheel' application to my Facebook profile, and I'm rather fascinated by the results:
I think there's some issues with their ordering, but you can still clearly see three distinct groups with high within-group linkage. The three groups line up pretty nicely with Lake Mary High School people, Carnegie Mellon people, and Caltech people. There's also some interesting between-group linkages -- for example, I had no idea that Andy from Caltech knew Ashley from CMU.
I think there's some issues with their ordering, but you can still clearly see three distinct groups with high within-group linkage. The three groups line up pretty nicely with Lake Mary High School people, Carnegie Mellon people, and Caltech people. There's also some interesting between-group linkages -- for example, I had no idea that Andy from Caltech knew Ashley from CMU.