Toshiba Dynabooks SS RX1 could be the lightest notebook by Toshiba which comes with impressive specs. It measures only 19.5mm thick and weighs at just 0.85kg, featuring Intel Core 2 Duo U7500 at 1.06GHz and Intel 945GMS Chipset.
Furthermore, the Toshiba Dynabooks SS RX1 also comes with 12.1-inches monitor display that capable to present 1280×800 resolution, a/b/g wifi, 1GB DDR2, 64GB SD card slot, and waterproof keyboard. There are no actual information on pricing and availability at this time, but with all the power that comes in the Dynabooks SS RX1, I bet it will cost you more than $1600.