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Viral spread of Facebook app watch!

vimeo.com — The movie above shows signup and invite data from the Bookshare Facebook application from July 18th of last year to now. As users sign up they are geolocated and plotted on the map. More users in a particular location mean brighter spots. Invites from one user to another are drawn as snaking lines that travel from the city of the inviter to the cit

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