Now that Apple has officially released the iPad we want to start designing for it. While Apple’s interface builder is great, it doesn’t really allow us to create custom UI elements on the fly. That’s why Geoff Teehan created iPad GUI PSD for us.

The PSD was constructed using vectors, so it’s fully editable and scalable. You’ll notice there are a few new UI elements as compared to the iPhone interface. The workable screen design is formatted to 768×1024 so anything you design in the Photoshop file can easily be brought over to the SDK.

Source: http://www.teehanlax.com/blog/2010/02/01/ipad-gui-psd/