11. The system of claim 9 , wherein the executable and operational data are further effective to cause the one or more processors to select one or more inferred interests for the user from among the at least one characterizing interests of the plurality of communities by: calculating a closeness for each of the plurality of communities; ranking the at least one characterizing interest of the plurality of communities according to the closeness of the plurality of communities; and selecting the one or more inferred interests for the user according to the ranking.
11. The system of claim 9 , wherein the executable and operational data are further effective to cause the one or more processors to select one or more inferred interests for the user from among the at least one characterizing interests of the plurality of communities by: calculating a closeness for each of the plurality of communities; ranking the at least one characterizing interest of the plurality of communities according to the closeness of the plurality of communities; and selecting the one or more inferred interests for the user according to the ranking. 13. The system of claim 11 , wherein the executable and operational data are further effective to cause the one or more processors to calculate the closeness for each of the plurality of communities by, for each of the plurality of communities: evaluating a size of each community; and calculating the closeness for the each community according to an inverse of size of each community.