Help! Gender Poll Online?

I'm trying to find a voting pool I can have friends and family go to to vote if we are having a boy or girl. The problem is all the baby pools I signed up for so far have too much going on. It's too early to guess the date, time, weight, length, etc. I just want them to guess the gender before we find out @ 20 weeks! I want to be able to see who voted what. And making people register for an account will scare people away from voting. It's just for fun. Please help if you have any ideas. Thanks!!