I am currently a sophomore in high school. Our tech director isn't the most helpful guy. Next week we have a production of Harvey happening. I asked him if we could rent headsets, and he said no because the follow-spot operators (students) should be able to remember all their cues. I thought this was wrong but there was no changing his mind. I started looking into other ways to make an intercom. I found an app called mumble. Its for gamers to talk to each other. It also have an IOS app. We found an extra router and set that up with not internet access and using an old laptop have set up a LAN server and will have people connect to it with their iPod touches and iPhones. This system has cost us $0 and works pretty well. It may not work as well, but it is a lot cooler then just renting a system and it is even wireless.