A student at Caltech has created a website (BuddyZoo.com) that tracks cliques within groups of peoples' buddylists. It also measures buddy popularity and allows you to do a six-degrees type search for other screen names. An interesting approach to social network theory."

http://slashdot.org/article.pl?sid=03/04/14/0347236

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Bill Richards
Professor
School of Communication, Simon Fraser University
http://www.sfu.ca/~richards