13. A system for supplementing a web graph of linked web documents, the system comprising: a server coupled to one or more client devices via a network, the server comprising: a user interface; a tag module; an identification module operative to: identify one or more experts for one of one or more categories; identify one or more documents tagged by the one or more experts for a given category; and determine a corresponding category of the one or more web documents tagged by the one or more experts for the given category; and a graph module operative to: assign a proxy web document to each one of the one or more experts identified for the given category, the proxy web document representative of a corresponding one of the one or more experts; and link one or more proxy web documents to the one or more web documents tagged by the one or more experts for the given category.
17. The system of claim 13 wherein the graph module is operative to link one or more documents tagged by the one or more experts for the given category to existing web documents linked to the proxy document.