One of my dream projects is to build an audience response system. I'd prefer wireless but to start out wired is fine. So, everyone in the audience gets a polling/voting device and it has 4or5 buttons or a keypad on it. You ask a question, they answer, then you see the results. Please, someone tell me there is something like this out there in the DIY world. Someone has to have done this! I have arduino and pi ready to code! Just need something to work from.