Getting the iPhone UI to update when you want it to is hard. Erica Sadun presents several good tips.
3D graphics on the iPhone is fun. Bill Dudney provides some useful code examples.
Have you ever examined an iPhone .app file? You can view the contents of most files in the app bundle, except PNG images. This article explains why.
An interesting trick to modify the camera preview screen. By the queen of iPhone SDK hacking: Erica Sadun.
UIScrollView is one of the most frustrating classes in the SDK due to the lack of control you can impose on it. I’m glad I’m not the only one who’s stumped.