TouchPad Pro is an app built for the iPhone which allows you to take control of your PC or Mac. Your iPhone needs to be Jailbroken for the application to work, and once installed it allows full control of your mouse as well as allowing you to use the multi-touch screen for zooming, scrolling and general keyboard entry. The iPhone TouchPad Pro app works differently on different apps. If you use a PDF document you can scroll up and down the page by placing 2 fingers on the screen and sliding them up and down. To zoom in to the document you move a finger and thumb apart to move closer to the page. I have to admit that it is one rather good looking application and just another reason for me to look in to buying an iPhone.