Well, it's not a quiz per-se but rather a plugin for rating things (doing reviews). You can define Type of Review (Book, Website, etc), Intro Text (what it's all about), Questions in the Review (rating different aspects of something), how many ratings are on each question (e.g. 1 to 3 scale, 1 to 5 scale, 1 to 10 whatever), as well as if you do not want those 3,5,10 possibilities to be numbers, you can have them as text fields instead. Then you can keep track of which users answer which way to each question, and also each user can comment on their answer to each question.
So thinking about it I am pretty sure you could use it for quizzes with zero changes (damn that's a good design! ;-))
With some luck (and motivation) it may only take me a month or so to write it. We'll see.
cheers,
-Alan
The Beer Geek