The Lapinator is the coolest named laptop accessory out there. It also could be considered the most useful. The Lapinator will keep your crotch from melting into a pile of goo by providing a thermal barrier between the laptop and your legs. It is available in a 13-inch model for $25 or a 18-inch model for $30.
The Lapinator uses 3M Thinsulate and a cross-linked molded foam bottom to keep the laptop and yourself cooler. It also includes small stick-on bumpers to elevate the laptop and provide better cooling. This is a must have for the bathroom, next to the toilet paper and stacks of magazine.