I could also set it up so that the first person to send me the correct answer gets some sort of recognition (maybe keep a list of first responders on the Web site?).
Update: For some really useful content, every day I could post an annotated solution to the previous day's puzzle. That might be fun. If I'm going to do that, then there's no need to automate the creation of the Web page, since I'll be doing something with it every day, anyway.