Sony VAIO X Series

And you thought the MacBook Air was light. The Sony VAIO X Series ($1,300 and up) is the world's lightest notebook, weighing just 1.6 lbs. and measuring just over a half-inch thick thanks to an amazing lightweight carbon fiber body. Other features include a 16:9, LED-backlit LCD display, a multi-touch trackpad, built-in Verizon 3G, 802.11n Wi-Fi, and Bluetooth, SSD storage, a 2GHz Intel processor, GPS, and Windows 7.