10. The method of claim 9 , wherein: the interaction factor includes a measure of interaction between the user associated with the user profile and each other user associated with each of the other user profiles; the reliance factor includes a measure of reliance between the user associated with the user profile and each other user associated with each of the other user profiles; and the commonality factor includes a measure of shared commonalities between the user profile and each of the other user profiles.
9. The method of claim 1 , wherein the determining of the relevance between the user profile and each of the other user profiles comprises determining the relevance between the user profile and each of the other user profiles based at least in part on a weighted combination of an interaction factor, a reliance factor, and a commonality factor specified by the predefined relevance heuristic.