If you're out an about and want more information on a product or if you want to compare the online price with the store price, you can quickly and easily get that info using the Cyclops app. It uses your camera to snap the barcode and then returns the information from Amazon. And it's free. It got a lot of bad ratings, but that seems to be partly because people tried to use it incorrectly or on an older phone. For now it only works with the camera of the new iPhone 3GS.