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http://tags.library.upenn.edu/tag/web2.0+cell_phones+swarm+twitter PennTags Feed for /tag/web2.0+cell_phones+swarm+twitter PennTags Feed http://tags.library.upenn.edu/makerecord/url/33201 http://tags.library.upenn.edu/makerecord/url/33201 Wired Campus: Keeping Friends and Acquaintances Informed, or at Sea, in a Swarm - Chronicle.com