An on-line community/social network system and method for provide a novel technique that enables an on-line community system to obtain information necessary to provide additional and more robust features to its users, solely from the user's participation in the community, and without requiring the users to do anything else (i.e., to explicitly provide the needed information). From this core approach, a number of advantageous novel techniques are provided by the inventive system to greatly enhance the quality and usefulness of various features and services that can be offered to community users as well as to provide them with entirely new and unique features as a result of user-specific data generated by the system's novel infrastructure.