Templates for iPhone design
While I haven’t had to do quite as much UI for iPhones, it is good to have a resource for creating the look and feel of an iPhone app, without having to build the app out first. It also is a good way to go, so you will know how it will look when all the parts are together.
I have found there are two good skins out there, one in Illustrator and one in Photoshop.
It is odd. There are pages and pages of blogs and websites talking about these two examples above. If you do a search, they come back to these two.
So, save yourself sometime, and just use these. I found most everything I needed to build with. It was wonderful.