Here is a beautiful user interface theme designed for iPhone apps. It includes 5 unique screens, and has mock layouts for popular app types including social networking, media players, and image sharing. This theme is aimed at app developers, and includes a sample Xcode project demonstrating how to implement all of the graphics. Absolutely no Photoshop knowledge is needed to start using the theme immediately (but if you do want to modify the theme, the layered and organised, vector PSD file is included).