Anyone who has seen a video of Steve Jobs demonstrating the iPhone must be eager to play with it and see what it feels like. The iPhone will be officially released on the 29th of this month, and the price is not cheap. But if you're in a hurry, you can play the iPhone's online emulator first. It is based on Yahoo! The UI Library, PHP, and Digg API can simulate the drag effect of the iPhone, and the interface is similar.