Writing software designed to be embedded in an appliance, phone, or some other real-world device is a growth area, but has its own set of challenges.

In the final part in this series, Builder AU wraps up with advice for developers wanting to take their mobile applications to market.

Hutchison Telecom's "3" will start to recruit business application developers in April, with a new Web site instructing developers how to use the company's 3G network the first step into battle with other carriers for the lucrative business communications dollar.