Amazon.com is previewing a new home page redesign with some of their users (in the exciting world of springing jarring changes onto the users of unreasonably large web sites, this is known as ‘bucket-testing’). You might not see the changes when you go to Amazon unless they put your account in the test bucket.
I’m not wild about the changes. I like the navigational tabs on top, where they used to be, instead of off to the side. To accommodate this, they made the new design much too wide (about 250 pixels wider than their previous design, I’d estimate — I had to resize my browser so I could see the whole page). The “TV Month” promo also takes up way too much space and the “What Do Customers Buy” widget is out of place on the home page (it should really only appear on a product page, since “What Do Customers Buy” is intended to provide an alternative to a specific product you’re looking at).