2. The method of claim 1 , wherein the importance rating obtained from the particular user for each of the plurality of nodes other than the particular node is obtained by receiving input from the particular user.
2. The method of claim 1 , wherein the importance rating obtained from the particular user for each of the plurality of nodes other than the particular node is obtained by receiving input from the particular user. 3. The method of claim 2 , wherein for each node within at least a portion of the nodes, the input is received from the particular user when the particular user follows an entity represented by the node.