@greghome, well cable or not, it's all left up to developers to implement gamepad controls at this point. Plus, you don't even need to buy this gamepad if you jailbreak your iphone and use your ps3 controller with it now.
If you buy an iphone Lightening Cable extender, you can hook up the MOGA Apple controller to your ipad. Now you have a controller that fits your phone and works on your tablet, too. No jailbreak needed.