When I worked for the Exploratorium as an exhibit developer a few years ago, I wrote some software that operated a real life "game of telephone". A voice modem randomly called phone numbers. If somebody answered the system told them they where playing a real life game of telephone, and that they were about the hear the previous callers message and to repeat it after the beep. Messages were posted to a website. I looooved that project. Never really worked, though. Most people just hung up. I think if you tweaked on it, you could get it to work- perhaps by soliciting numbers from the site, so you were aware that such a system might call you, etc. Anyway, phone mayhem = fun!