Despite the lack of a proper SDK iPhone apps have become a cottage industry. An industry that makes no money for those that are whipping up these apps, it is true, but who needs money, right?
The latest iPhone app that has no business model, but a very cool concept, is MockDock. MockDock is a simple webapp that links to a number of other iPhone ready apps. The clever part? It mimics the look of the iPhone home screen, so you add apps to your 'Dock' and go from there.
Mock Dock requires your email address to sign up, but it is free.