4INFO LogoGiving users mobile access to data is the latest vogue, but unless you’re a mega-corporation, or have a boat load of funding, it can be prohibitively expensive. If you’re looking into getting a short code and building your own SMS gateway, be forewarned: it’s an arduous process that’ll cost you upwards of $15,000. For the rest of us, 4INFO’s Open Platform is a pretty cool (and FREE) alternative that enables developers, content providers, and bloggers to utilize the 4INFO short code to deliver mobile content.

The 4INFO platform allows content providers and developers to register a keyword that triggers the retrieval of data from a content feed or some other web service. Users receive your content by texting this keyword (e.g., ’slashdot’) to 4INFO (44636). For bloggers, 4INFO makes it simple to provide updates via SMS by parsing your existing RSS or ATOM feed.

Developers who are trying to build more sophisticated services can do so by telling 4INFO to forward requests to an existing (or new) XML/REST-based web service. The XML response is transformed by 4INFO using a custom XSLT stylesheet that you provide. Thus, you can build sophisticated applications that support menu systems and generate dynamic responses, all using the familiar web-service paradigm.

There are some limitations. For example, the platform provides no easy way to send messages unless they’re in response to a user’s request. But overall, 4INFO Open Platform is pretty cool, and if you can live with the limitations it can save you quite a bit of cash.