Reference
Getting Started with iPhone Web Apps
Smashing Magazine: Web Development for the iPad
Development Tools
PhoneGap - Tool for packaging Web Apps for iTunes store and Android Store.
PhoneGap Google Group
Techniques
Detecting an iPad and redirecting to a mobile site - David Walsh
Detecting an iPhone or iPod - David Walsh
Detect iPhone Orientation
Detect iPad Orientation with this code:
<link rel="stylesheet" media="all and (orientation:portrait)" href="portrait.css">
<link rel="stylesheet" media="all and (orientation:landscape)" href="landscape.css">
