Adam from IQMatrix sent me this link to his web site where you can purchase some rather interesting Shakespeare study guides featuring colorful, cartoony "mind maps" that attempt to show the important aspects of each play visually on a single page.
The idea of mindmapping Shakespeare is certainly not new, and it is indeed quite a challenge to not end up with a spaghetti-monster mush of lines more confusing than the original text. I like IQMatrix's use of cartoony clip art to draw your eye to some easy concepts (like "love" or "spies on"), instead of feeling like you have to start in the middle and work your way out (which defeats the whole purpose of mind maps by making you think you have to work linearly through a very non-linear diagram).
It's certainly an educational resource, and I don't expect that the analysis is all that advanced. But for folks who like their information visual, it might be just the thing.