Not a bad summary and it's nice to include the screenshots/examples of non-Apple...

Not a bad summary and it's nice to include the screenshots/examples of non-Apple apps, but here's a more formalized description of the three application styles: http://developer.apple.com/iphone/library/documentation/User...

Part 1 of the iPhone Human Interface Guidelines is a good read in general if you're an iPhone developer, and it isn't too long.