PhotoKeys for iPhone [iTunes App Store link] is an interesting app. In short, it turns your iPhone into a small touch screen to access the Photoshop tool palette—Move, Marquee, Lasso, Magic Wand and so on—as well as other common functions such as Copy, Paste, Undo, Save, etc. You get the idea. Let’s get the first question out of the way: why? Well, I can see a few situations making this app useful