After fighting with CEGUI for the past week, I've come to the conclusion that this is not the right library for me. The user documentation is pretty much what I'd expect from an open-source project, but that's okay. As long as I have the source code, I'll find my way. No, it's the amount of work that needs to be done just to do something simple.
I was hoping I could show a couple of cool things this weekend, but alas. In the meantime, I'm going to check out libRocket, Right Brain GUI, and MyGUI.