iPhone apps are certainly hot. AdAge recently wrote an article about the developer of the Brushes iPhone App.  The important take away is that there are many apps out there that don’t make money.  Getting the app to the store is just the first step.

All iPhone Apps must also be 3.0 compatible. TechRadar

Increasingly, apps have to be supported by traditional marketing; otherwise they have little chance of making it to many iPhone screens. “The App Store is not a marketing vehicle; it is a distribution vehicle,” said Raven Zachary, president of digital creative firm Small Society.

via Mobile Marketing: Just Having an iPhone App Isn’t Enough – Advertising Age – Digital.