How We Built Our Real-Time, Location-Based Urban Geofencing Game Posted by caseorganic on Thursday September 29, 2011 @12:44PM from the blog.programmableweb.com dept. http://blog.programmableweb.com/2011/09/29/building-a-real-time-location-based-urban-geofencing-game-with-socket-io-redis-node-js-and-sinatra-synchrony/ ( 2 comments | 24 points | on HN )