I thought those cables could only connect to a USB host (like a PC) or is it something a bit different to the standard one?
I believe this is a specific cable by apple that is designed for this. This might eventually justify me getting an iPad as if this works well then I could use at weddings during the formals to ensure everyone's looking and in focus. It's very hard to gauge on a 3" screen. I'd be interested to hear how well this works in live shooting environment as I wouldn't want to be waiting forever for the picture to load up on the iPad.
Canon 5D Mark II, 50D, 24-105L IS, Sigma 35 1.4, Canon 40 2.8 Canon 70-200 f4 L, Canon 70-200 IS II L, Canon 600 EX-RT, 580 EXII, 430 EXII