Have you ever considered open sourcing this and having it be a wikipedia of learning map?
As for learning map idea, I want to do it but not as part of the wiki but as a general purpose tool for mapping/tracking knowledge. It's also open source.
The other big thing that would be helpful is a "videos" node where you could link to videos on the subject. A lot of people that I talk to struggle learning completely new topics just by reading. Some of the feedback I hear is that a few videos goes a long way to introducing something new, so a videos node could be useful in the overall graph.
Thanks for feedback though.
Probably not useful to you personally since there aren't forks out there yet, but it's cool to see you've got all the infrastructure in place for some kind of "mind meld" feature.