Strange subject, but I am looking in to developing a point of sale system for iPad (specifically for bars) and one concept was to use iPod touches as customer facing displays that shows the prices of items being charged for on the iPad side. Ideally the iPad side will be written as a web app in PHP but this is early stages so nothing is set in stone. Could this be done? Also, would there be a way to play a video when the display is inactive (sort of like a screensaver but displaying promotional videos) instead of the display sleeping? Any thoughts would be appreciated!