17. The computer program product of claim 16 , wherein the code when executed performs further steps comprising: varying the weight applied to the measure of likelihood based on a measure of closeness between the first user and the second user.
16. The computer program product of claim 10 , wherein the code when executed performs further steps comprising: weighting the measure of likelihood for the third-party content object associated with the interest of the second user, the weighted measure of likelihood describing whether the first user is interested in the third-party content object.