1. A method performed on a computer for determining relationships between members of a content sharing service comprising: receiving a digital content comprising one of a digital picture and a digital video from a computer associated with a first member of the content sharing service, wherein the digital content includes a tag element that identifies an individual depicted in the digital content, and wherein the digital content does not comprise an electronic mail message; processing the tag element to determine a name of the individual depicted in the digital content; determining that the name is associated with a second member of the content sharing service; generating a relationship link comprising a member identification field that contains data identifying the second member, and a relationship strength field; storing the relationship link in a memory; receiving a second digital content comprising one of a digital picture and a digital video from a second computer associated with the second member, wherein the second digital content includes a second tag element that identifies a second individual depicted in the second digital content; processing the second tag element to determine a second name of the second individual depicted in the second digital content; determining that the second name is associated with the first member; obtaining the relationship link from the memory; modifying a relationship strength value in the relationship strength field of the relationship link to indicate a greater relationship strength between the first member and the second member; and storing the relationship link in the memory.