This is the feature requests board, where requests for new features for future coppermine versions go to, so I'm afraid to tell you that polls probably won't go into the coppermine core code in the future (meaning your request has been turned down). You are however welcome to come up with a hack. You probably weren't suggesting this for future versions of coppermine, but you just want someone to code this for you; I can't speak on behalf of others, so there's a chance someone might like the idea and code it, but I rather dout it - having polls is more the turf of a BBS, and coppermine can easily be bridged with one. There are standalone poll scripts available as well that you might want to take a look into and try to integrate.
Joachim