24. The system of claim 23 , wherein the existing metadata comprises at least one of: user behavior data; and market data.
25. The system of claim 24 , wherein market data comprises information regarding at least one of: inclusion of the media object in a library catalogue; purchase of the media object as a gift; the media object's presence on a current popularity chart; sharing of the media object on social networking sites; and a metric indicating a level of discussion of the media object.