The iPhone's famous interface is already (illegally) available on Windows Mobile and Palm-based smartphones as skins. The iPone skins don't add any real functionality, but they do completely rip off Apple's trademarks left and right, something that has upset Jobs & Co. As such, Apple has demanded the removal of the files from the messageboards (Brighthand and xda developers) where they were first posted. You're probably better off just waiting for the real thing.