Apple released iPhone SDK 3.2 today

If you are an existing member of Apple's iPhone Developer Program, you can login on their site and download the new SDK, which includes an iPad simulator for testing apps that are under development.

There are also available new iPad Human Interface Guidelines and iPad Programming Guide that introduces new iPad features and how-to about their implementing in applications. New user interface guideline outlines ""how to effectively use the new views and controls available to you to deliver unforgettable applications to your customers".

Apple also launches a new Universal Application binary format for iPhone OS apps. It will allow developers to create an app that can take full advantage of the features of the iPod Touch, iPhone and iPad. So the iPad and iPhone code will be wrapped into one app package making distribution and management much easier.