Very cool.  I remember back at Caltech when Adam D&#x27;Angelo wasn&#x27;t a Quora founder and was just a hacker dude he made buddy zoo and it had these awesome social graphs.  I think this was ported into the early version of facebook and didn&#x27;t really end up doing that much because the graphs were very simple.  Now that social networks have an older audience with a more complex social graph I think this type of stuff could be really useful (especially if you could create FB or other groups from it).