UPDATED: iPhone home screen Exposé mock up seems interesting

UPDATE: The type of feature talked about in this post has, in fact, been implemented by an iPhone developer. Unfortunately, it is only available through jailbroken iPhones on the Cydia App Store, as there is no way Apple would allow this in the actual App Store. However, if you do have a jailbroken phone or touch, be sure to check it out. You can purchase it through Cydia for $1.99 and find more information about it on Steven Troughton-Smith’s website.