wow!! Nick you are the best!
Concepts Maps are great technique for representing people understanding of a domain of knowledge. A package for deal with this inside dotFOLIO could be a great enhancement towards a knowledge system from OpenACS.
For now I am using concept maps with dotLRN where a set of conceptual maps and associated resources about a particular domain of knowledge is referred to as Knowledge Model. Conceptual Maps are used for showcasing assets stored in the Lors system. You could see screenshots http://www.teknedigital.com.br/screenshots/ in section Lorsm Cmaps.
In this case, Cmaps are generated with IHCM Cmaptools (http://cmap.ihmc.us/) and exported from this tool as web pages. Web pages and associated resouces (links, files, video, audio, swf etc) are converted to scorm zip package with reloadtools (http://www.reload.ac.uk/) and imported to dotLRN with lorsm.
I wonder if dotFOLIO could support new ways to create conceptual maps. How i could help you?
\Orzenil
