If anybody is interested in beta testing this app head on over to the site. A friend of mine is a developer on this project.
It's basically a free texting app that will not use up any data if you are on a SMS plan.
It also can be configured to pull in SMS as well and not use your data. It will not be instant though. It polls every minute I believe.
Not sure how many beta testers they are looking for but I would jump on it asap if you are interested.