Optimizing Your Site for an iPhone

This tutorial will help you optimize your current site to fit an iPhone screen. Design wise you can't take everything you have on a desktop site and put it on an iPhone. It just wouldn't work because you don't have much real estate to work with. So you are going to have to cut some things out and redesign it a bit. This tutorial shows what they did to an existing site to make it fit an iPhone. They also talk about the different style sheets you would need, and how to test your site with emulators.

Tutorial: Optimizing your website for mobile devices