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Today, from Complexity digest

 Six Degrees of Messaging , News@Nature

Excerpt: The resulting figures produced a neat map of communication
hotspots across the world, and allowed Horvitz and Leskovec to trace the
extent of separation between Microsoft Messenger users. They found that
the average shortest number of jumps to get from one random user to
another was 6.6; spookily close to the infamous six degrees of separation
demonstrated practically in a group of 64 people by Stanley Milgram, at
Harvard University, in the 1960s.

* [16] Six Degrees of Messaging, Katharine Sanderson, 2008/03/13, DOI:
10.1038/news.2008.670, News@Nature

 Barry Wellman

  S.D. Clark Professor of Sociology, FRSC              NetLab Director
  Centre for Urban & Community Studies           University of Toronto
  455 Spadina Avenue          Room 418          Toronto Canada M5S 2G8            fax:+1-416-978-7162
  Updating history:
         Elvis wouldn't be singing "Return to Sender" these days

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