Great idea. You know I'm in, Mike, as we've talked about this idea before. I'm all for it being more competitive, but I'm a competitive person, so...yeah. Fun competition, though, right? A few suggestions:
1) If you create a question and it involves a specific book you list both the number and the name of the book (ie In book #1, The Invasion why did X happen?). This avoids confusing people who know the series either only by number or only by title.
2) The judges rotate in some form or fashion. I'm not sure exactly how this would work, and it depends on how many people are involved, but unless someone volunteers to strictly judge then I think everyone should have the opportunity to compete. This just means that the judges only have access to the questions that they will be judging, instead of the whole list. I'm mostly saying this in case there aren't huge numbers competing. We don't want 5 people interested with 2 who can't compete b/c they're judging.
3) We impose a time limit of some sort for answering questions. I'm mostly adding this for myself and others who I know own the entire series. It'll be awfully tempting to run to the bookshelf, grab the book and look up the answer. A time limit may restrict such blasphemy.
Just a few suggestions off the top of my head. I'd love to compete and/or judge. Since I'm in charge of the group re-read's does that give me an unfair advantage? If so, I'd be happy to stick to primarily judging. If not....it's on like donkey kong!
(ps...who the heck would pick "no" to an idea like this?)