Daniel McLaren has built a Facebook friends visualization using his own
flash-based graph visualization tool called Constellation. The interface lets you see which of your
friends know each other. At any given time it will show one of your friends
as the selected node (in bold), and any mutual friends as additional nodes.
Lines between nodes represent friendships. Clicking a node will select it
and you and the new person's mutual friends will appear. Finally, the colour
of the circles represents gender: yellow is female, purple is male,
and grey is unknown.
The information cannot be retrieved all at once so
you'll find that the visualization will constantly change as more
information comes in. It takes a while to load the data but it (usually)
gets more interesting the longer you wait. Watching the nodes re-arrange
themselves is fun, but also processor-heavy. If you have a lot of friends
the CPU load will be pretty high.