Location-based social networks were one of the top
five trends of 2010. Nowadays, location is baked into pretty
much everything that developers do. Mobile and social apps are
location-enhanced, not location-based. You still can, however, "check
in" somewhere using geosocial networks Foursquare, Gowalla and Facebook
Places. Location-based services like Yelp utilizes the geographic
position of your mobile device to figure out what's nearby.
Wondering who's actively using geosocial and location-based services?
Take a look at this handy infographic.