We've been looking at developing mobile interfaces for some existing apps recently.
Obviously the ususl questions come up - which platform(s) ? / market coverage ?, and as ever there is no simple answer.
When you inevitably talk about the iPhone as a platform, you have to consider that it has a closed delivery system (the App Store). Is the investment in buiding the application (which could be rejected !) is worth it ?
The iPhone is, however, unique amongst other platforms in so much as it offers html extensions that produce a native looking widget set. One of my colleagues found this link that succinctly describes how to use the power of HTML 5 to do more thsn you might think possible.
Go have a look at - http://sixrevisions.com/web-development/html5-iphone-app/
