This was one of the earliest network maps I worked on in Q1 2008 -- rather solipsistically, it's a map of my own Facebook friends (with my own node removed, so that it pulls apart a little.) It attempted to map two degrees of separation; what you see here is my friends and their friends. I think I removed the pendants.
All of this was really a proof-of-concept for RUFUS. Using my own data, I could have a pretty good feeling for who the authorities, hubs and connectors would be, and tune our processes accordingly.
But I hadn't figured on the lack of "directedness" on Facebook; put simply - if I'm your friend, you're mine too. So all I got were pretty weak "popularity" scores. There was no perceptible difference between someone that was an active social networker and someone who was highly admired.
Nonetheless, we got a good long way playing with this data.