A company called Fromdistance has released a program for Series 60 Symbian cell phones, which allow you to use your phone as a Web Application SMS Gateway.

Basically you download the Series 60 (Symbian) client and install it on your phone. It will check their server for any "queued" messages, and if it finds any it will send them out - so the message will come from your number, at your expense (or for free, if you have free SMSes).

You can "queue" message by sending an HTTP POST to their server, which means you can implement it into a website, intranet, Facebook App, etc.

It can also check your received SMSes for a keyword or phrase, to flag them as "inbound" messages, which are then sent to their server and forwarded on to your web application.

That allows your web app to communicate with people via SMS, and allows them to communicate via SMS with your web app.

See FromSMS

Hope someone found this interesting, helpful, or financially beneficial (in which case feel free to share with me).