Mac App Storm gathers together a collection of iPhone apps with noteworthy designs. They say, "Whether you’re looking for a robotic unit converter, a realistic app for reading novels, or a intuitive Twitter client – this roundup has something for you. Each application puts design first, offering a fantastic user experience." Check it out.
http://mac.appstorm.net/roundups/iphone-roundups/30-iphone-apps-with-sexy-interfaces/