You do not have to have Mac machine and you do not have to join the Apple developer center, yet you can still develop apps for Apple’s i-devices. The following resources are great for beginners. The list will getting longer… …
HOWTO: Create native-looking iPhone/iPad applications from HTML, CSS and JavaScript
Written by Matthew Might
How to Make an HTML5 iPhone App
Written by Alex Kessinger
iPhone events
from www.quirksmode.org
Detecting iPhone’s App Mode (Full Screen Mode) For Web Applications
Quick Note: Since iPhone/iPod touch gave different window size when running in app mode and web mode, detecting the running mode of your site is necessary to help you layout your application correctly. When you are in app mode, you have a screen size of 320×460. When you are in web mode, it has a screen size of 320×356.