It would be awesome if you could export the knowledge graph to GraphXML. This would allow it to be exported to Maltego or other software as the basis for a new graph.
This would be great for example people working in incident response or any type of investigation as you can compile your notes and have the basis for your graph generated automatically.
An extension of this would be to allow the user to start with a graph and add nodes that would automatically create pages and back links. You could even trigger this via a GtaphXML import.