12. The system of claim 11 , wherein the operations further comprise assigning weights to “me” edges, wherein a weight assigned to a “me” edge from a first node to a second node is determined from a reputation value assigned to the first node and a measure of textual similarity between a user name associated with the identity represented by the first node and a user name associated with the identity represented by the second node.
12. The system of claim 11 , wherein the operations further comprise assigning weights to “me” edges, wherein a weight assigned to a “me” edge from a first node to a second node is determined from a reputation value assigned to the first node and a measure of textual similarity between a user name associated with the identity represented by the first node and a user name associated with the identity represented by the second node. 13. The system of claim 12 , wherein the measure of textual similarity is one of two or more predetermined values.