DAL4EVER, I can't believe how much you have remembered from your old regional days! That's pretty impressive as far as I'm concerned! Nice job!

I also thought the electrical system was the most complicated and painstaking system to learn while in my systems class. The diagrams did nothing but confuse me more. The nice thing about the RJ's synoptic pages is the electrical system pages. I can visualize exactly what bus is being powered by where, and it's easy to work with in flight. I've yet to have any electrical issue come up except for an AC BUS1 fail that was intermittent in flight.
As far as the OP is concerned, there is a great book out there called "CRJ Systems." Go search for it on Amazon, I bought it, and it really helped out. It's all question and answer format, and is a great interview or oral exam guide. I found it VERY useful, and it wasn't very expensive... maybe 15 or 20 bucks.
The CRJ2 website by the Mesa sim guy was a great tool. He also published hard card study materials that highlighted the major points of all the systems, and he was not just a sim guy but a check airman who gave orals. Most of his questions came from his study material.