Shell Shocker! Today only. Newegg has the refurbished Macbook Air 11" 64GB SSD Notebook MC968LL/A (Summer 2011) for $400 with free shipping. Features Mac OS X 10.7 Lion, Sandy Bridge processors, a single Thunderbolt port and backlit keyboard.
Intel Core i5 Dual Core 1.6GHz, 2GB DDR3, 64GB flash storage Intel HD 3000 graphics, 5 hour battery, Mac OS X 10.7 Lion