I just purchased an iPad 2 64Gb. I want to add photographs to my iPad. I want the photographs to completely fill the screen but still be small enough to use the minimum amount of memory space. A smaller image size will also make them more responsive when navigating between images. Does anyone know the image pixel dimensions that I should use to have the photographs completely fill the iPad screen? I am assuming a resolution of 72 pixels per inch is sufficient because the screen is essentially a video screen. Thanks!