Last month I created Tetris with Twilio. It allows any telephone (USA only) to be used as an input device to a game of tetris that is played within a web browser. The best part is that once you clear 5 lines your phone is redirected to me and I'll probably pick up and talk to you.
How does it work? I use Twilio to deal with input from the phone. The main purpose of this project was to learn more about tornado. Tornado makes it easy to push data to the user in realtime. And for those that like source code it is available here.
Enjoy!