“Because online geosocial networking sites target locally familiar content, participation tends inherently to encourage face to face interaction of users in or around local places.” (http://en.wikipedia.org/wiki/Geosocial_networking )
The fusing of Social Media and Location-based information is destined to become one of the most significant developments in commercial communications technology of the 21st Century.
Early adopters in North America have developed applications such as Foursquare, Brightkite & Gowalla to revolve around the need, on a personal level, to keep in passive touch with friends whilst keeping open the option of an impromptu meet up. Each of these has a certain fun element built in – becoming a “Mayor”, collecting badges, posting geotagged photos.
GPS has been widely available for many years & has more recently migrated to mobile phones. The social swell is already beginning, with the likes of Facebook, Google & Twitter beginning to optimise their services for location & geo-tagging.
All these & more offer considerable commercial marketing opportunities in the immediate future. The only barrier at this moment is low take-up, which, as awareness grows, is destined to turn into a new tide, and a wave not to be missed.