Btw, you can also do a trivia question with the missing letters/numbers like for example: Question: It's an imperial unit of speed expressing the number of statute miles covered in one hour. XX _ _ _ QD2MZ85N6WK (It's an iTunes $10 Gift Card code btw.) I've done this on my past contest and it's fun.
Yeah. Hope it's not a lurker who got it first. Maybe I'll post here from time to time so better watch out.