10th April 2005, 9:43 PM
Actually the start and back buttons are to either side of that big white circle. It's not even for sure that it's a button. It might be where the logo will go like on the original Xbox controllers. Or perhaps it relates to the "circle of light" we heard about before. It could light up to show the controller is on/needs to be recharged. Or maybe it's a button that takes you to Xbox Live. It could be any of those things, none of them, or all of the above.