In one embodiment, a method includes storing one or more content postings that each include data representative of one or more content instances. Each content posting is associated with one or more first users. The method also includes storing one or more data records associating one or more geographic locations with accessing of the content instances. The method also includes selectively sending one or more of the content postings for display on an access device associated with a second user based on a past or present geographic location of another access device associated with the second user.