Via a comment posted on Fangs, Fur, & Fey, I got the idea to load up a desktop wiki to keep track of my writing universe(s). As it seemed like a fantastic idea, I downloaded and installed MoinMoin Desktop Edition.
I'm in love.
Still entering information, and it'll take ages to perfect, but it'll give my brain a handy crutch. I have a feeling I'll have to learn a little bit of programming (or at least Python) to make it do everything I want, but the interface is easy and very friendly, and the software is sleek. It's beautiful. I highly recommend it, and I'll be using it for other writing projects in future.