The MobyQ project is unique in many ways but most notiable is the implementation of wireless modems. The website actually sends are receives text messages from your cell phone. Using some custom perl software that we wrote, the modems send and receive messages directly into and out of a database and are then sent to the webserver for processing. Once the webserver is done it sends back the response to the user.
We build the system so that it can scale quickly we can add several hundred modems very quickly and easly if the load gets to be to high.