Also, for tourists versus locals, this is fantastic, using geocoded tweets. It confirms what I tell out-of-town visitors to Chicago: Locals don't go to Navy Pi

Also, for tourists versus locals, this is fantastic, using geocoded tweets. It confirms what I tell out-of-town visitors to Chicago: Locals don't go to Navy Pier. http://www.mapbox.com/labs/twitter-gnip/locals/#13/41.9007/-87.6005 http://www.mapbox.com/labs/twitter-gnip/locals/#13/41.9007/-...