I see that brilliant minds think alike, Nathan. I've been contemplating doing exactly what you're suggesting there, for several weeks now. Running it past the crew behind the scenes right now, so we'll see what turns up...

Granted, I think that the "EU" portion is more a subset of the Book (Jocasta) section really, if you're including all the reference types of materials on the films and collectibles, and stuff like magazines and whatnot. I basically view "EU" as Star Wars fiction, for the most part, which definitely falls under books. But I don't think the aforementioned "reference" type of books necessarily fall under "EU" though, like Sansweet's "Action Figure Archive" book, or the coffee table Star Wars Chronicles reference book, or the recent magazines covering the ROTS movie, etc...
Anyway, stay tuned, and we'll figure something out for this, 'cause I agree that it's confusing, and for the most part, repetitive.
- M