Number 1 In Service via Amazon offers Prime members the Targus Netbook Chill Mat, model no. AWE39US1, for $3.99 with free shipping. (Non-members can spend $25 or more to qualify for free shipping; otherwise, shipping costs $9.06.) That's a buck under September's mention and the lowest total price we could find now by $6. Sales tax is added where applicable. It features two fans and is powered by a USB port.

Update: Of note free shipping is only available for Prime members, not everyone as mentioned previously.