The Thermaltake Massive TM is more than just a laptop cooler with a pair of 120mm fans to keep your temperatures in line, it can also track the temperature of your laptop as well.  The cooler is USB powered but does offer USB pass through so you do not end up down one plug when you are using the Massive TM.  HiTech Legion's testing showed an average drop in temperature of around 4C, if that is worth $40 to you then pick one up.

"The Thermaltake Massive TM is a 17” laptop and notebook cooler that comes with a little extra. The Massive TM by Thermaltake uses 4 temperature sensors that can each be repositioned to track temps on different parts of your laptop."

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