I am just wondering if anyone has seen any Macbook Airs in any of the Apple stores around the world? I have read many posts on MacRumors of people who have bought a new MBA and have had to replace them x3 times regarding different issues. So what is happening to all those MBAs that have been returned? I thought they would become refurbished models, but I have not seen any on the US Apple Store. Does anyone have any idea why?