since there have been SO MANY views to this thread and NO replies, I figured I'd post an update.
I found a trivia ad-on. Check it out here: http://www.quiz-fun.com/
It's not perfect by ANY MEANS, but it was one of the few which allowed me to create my own questions and answers AND allow me to post the quiz directly on my site.

If anyone finds something better, please let us know!
www.goatofthegame.com