23. A system for visualization of a set of objects in a computer graphic interface, comprising: a hierarchy comprising a plurality of objects which satisfy a set of inclusion criteria and a respective hierarchal organization of the plurality of objects, the plurality of objects each having associated content, a placement position of an object within the hierarchal organization being related to a content of the respective object; at least one additional object, supplemental to the hierarchy, a placement position of the additional object within the hierarchal organization being selectively based on a relationship of content associated with respective nearby objects and a content associated with the additional object; and an output, adapted to present the hierarchy and the at least one additional object to the user.
23. A system for visualization of a set of objects in a computer graphic interface, comprising: a hierarchy comprising a plurality of objects which satisfy a set of inclusion criteria and a respective hierarchal organization of the plurality of objects, the plurality of objects each having associated content, a placement position of an object within the hierarchal organization being related to a content of the respective object; at least one additional object, supplemental to the hierarchy, a placement position of the additional object within the hierarchal organization being selectively based on a relationship of content associated with respective nearby objects and a content associated with the additional object; and an output, adapted to present the hierarchy and the at least one additional object to the user. 24. The system according to claim 23 , wherein the at least one additional object is associated with an object based on a collaborative filter.