A SOCIOLOGIST among geeks and a geek among sociologists, Danah Boyd has 278 friends who link her to 1.1 million others.

So says Friendster.com, whose millions of members have transformed it from a dating site into a free-for-all of connectedness where new social rules are born of necessity. A 25-year-old graduate student at the University of California at Berkeley, Ms. Boyd studies Friendster, hovering above the fray with a Web log called Connected Selves (www.zephoria.org/snt) and interviewing Friendster users. Her irrepressible observations have made her a social-network guru for the programmers and venture capitalists who swarm around Friendster and its competitors.

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