I know it was forever ago, but here are the poll results for the pronunciation of "crayon."
I am so relieved that five other people pronounce it "crown," like I do. And no, I have no idea where that pronunciation comes from. I only know that I am ashamed every time I say it.
I found the pronunciation distribution maps from this dialect survey. It looks like I have at least one "crown" friend in Portland, Oregon.
Red is crayon=cran.
I'm figuring out a new poll tool that will keep it inside of a post, so we'll see if I can get that to work...