Have a look here:http://hubpages.com/hub/Best-Laptop-Cooling-Pads
I've personally never given much credence to laptop cooling pads, as they don't really work like they advertise them to work. You may see a few degrees drop, but otherwise than that, I wouldn't expect much. I always recommend using a laptop on a flat, hard surface, i.e. like a hard cover book or a table.