Mobile websites have come a long way, but if you want to take full advantage of a smartphone’s hardware, or get listed in the iTunes App Store, you need to compile your code. The Easiest Way to Build your First iPhone App
Setting Up Photoshop For Web, App and iPhone Development - Smashing ... Most people who have designed websites or apps in Photoshop will, at one point or another, have had issues trying to match colors in images to colors generated by HTML, CSS or code.
Making a webapp for the iPhone is a lot like making a normal web site, but with a few quirks to abide by. 10 Tips for New iPhone Developers - Nettuts+