jonarnes: RT @Thomas_Husson: Some stats on Foursquare via @servicesmobiles: http://bit.ly/eOubrG #infographics Posted on January 31, 2011 by Jon Arne Sæterås jonarnes: RT @Thomas_Husson: Some stats on Foursquare via @servicesmobiles: http://bit.ly/eOubrG #infographics