To generalize that a bit, I guess I'm talking about a reputation network. You could visualize it with a directed graph that has edges weighted from -1 to 1 (0 d

To generalize that a bit, I guess I'm talking about a reputation network. You could visualize it with a directed graph that has edges weighted from -1 to 1 (0 default). Recommendation + rating history is used in some way to assign those weights, and then future recommendations are taken primarily from other users who have high weights from your perspective.