this link might be an idea :
- http://thinkbase.cs.auckland.ac.nz/
- http://www.wikimindmap.org/

dear admin,
in achieving transfer of knowledge that user expect might helpfull if there is such a tool can extract an idea from document that already submitted. something like "visualize wiki", text ontology, mind map....or other so it might help the user to identify, extract or summarize idea/issue/new concept from the document.

Thx