17. A system comprising: a sensor comprising: a movement sensor associated with a first user for detecting a physical movement of the movement sensor with a proximate sensor associated with another user; a processor in communication with the movement sensor, the processor for generating a physical movement profile comprising a data profile characterizing the detected interaction as a function of the physical movement; a local area identity transceiver for transmitting and receiving at least one user identifier; and a network transceiver for communicating at least one of the physical movement profile and the user identifier; and a computing device in communication with the sensor, the computing device for: storing a social graph comprising a plurality of nodes and edges, wherein a node represents a user or an entity and an edge represents one of a connection between users or an interaction between users performed via the social networking system; storing a plurality of baseline data profiles representing physical social interactions associated with users, wherein a baseline data profile specifies a physical movement of a sensor; receiving the physical movement profile from the sensor, the physical movement profile comprising the data profile characterizing an interaction between the sensor and the proximate sensor; comparing the received physical movement profile to the plurality of baseline data profiles to identify a matching baseline data profile responsive to a matching of the physical movement specified by the data profile with the physical movement specified by the matching baseline data profile; identifying a physical social interaction corresponding to the physical movement profile based on the matching baseline data profile; adding a new edge to the social graph of the social networking system, the new edge representing the identified physical social interaction; and notifying one or more other users of the social networking system that the first user engaged in the physical social interaction with the other user.
17. A system comprising: a sensor comprising: a movement sensor associated with a first user for detecting a physical movement of the movement sensor with a proximate sensor associated with another user; a processor in communication with the movement sensor, the processor for generating a physical movement profile comprising a data profile characterizing the detected interaction as a function of the physical movement; a local area identity transceiver for transmitting and receiving at least one user identifier; and a network transceiver for communicating at least one of the physical movement profile and the user identifier; and a computing device in communication with the sensor, the computing device for: storing a social graph comprising a plurality of nodes and edges, wherein a node represents a user or an entity and an edge represents one of a connection between users or an interaction between users performed via the social networking system; storing a plurality of baseline data profiles representing physical social interactions associated with users, wherein a baseline data profile specifies a physical movement of a sensor; receiving the physical movement profile from the sensor, the physical movement profile comprising the data profile characterizing an interaction between the sensor and the proximate sensor; comparing the received physical movement profile to the plurality of baseline data profiles to identify a matching baseline data profile responsive to a matching of the physical movement specified by the data profile with the physical movement specified by the matching baseline data profile; identifying a physical social interaction corresponding to the physical movement profile based on the matching baseline data profile; adding a new edge to the social graph of the social networking system, the new edge representing the identified physical social interaction; and notifying one or more other users of the social networking system that the first user engaged in the physical social interaction with the other user. 22. The system of claim 17 , wherein the sensor further comprises an image capture system.