Potential iPhone developers should go and grab the latest release of the SDK, beta 2, and revel in the new Interface Builder. Make your own fancy UIs for your iPhone game, or maybe just make an improved iFartz. We're cool with either

The iPhone Developer Program provides a complete and integrated process for developing, debugging, and distributing your free, commercial, or in-house applications for iPhone and iPod touch. Complete with development resources, real-world testing on iPhone, and distribution on the App Store, you have everything you need to go from code to customer.

By Using iPhone SDK, you can :

1. Develop
Develop your application with the iPhone SDK, iPhone simulator, and the wealth of technical resources in the iPhone Dev Center.

2. Test
Test and debug your code on iPhone using sophisticated and elegant tools to finalize your application.

3. Distribute
Distribute your applications on the App Store, the exclusive channel for iPhone and iPod touch applications.