Agreed! I am pleasantly surprised that someone else is doing this! I have been drawing "concept maps" for myself for the knowledge they taught in high school and undergrad school. I have always thought I was the only one to draw such things :) I am a very visual person and these maps help me memorize stuff but also understand how everything fits together.
I did not know it. It would be nice if one could travel through graphs by just clicking on nodes, expanding other neighboring nodes, etc. Too bad it seems to only allow browsing up to 2 nodes away from the central node...