Laptop Cooler suggestion
I am using a Zalman NC-1000 with my Core i7 15" as I write this, and I have supplied several to my consulting customers, who rave about them.
I have tried others (Targus, many others), but they last a year or less, besides having a cheap plastic feel. The Zalman is very well-made, and very effective at reducing operating temperatures. Count on a substantial decrease in enclosure and CPU temperatures, and probably a longer battery life from avoiding the highest temperatures.
The Zalman cools best on a hard surface, because it vents out the bottom. It will not work as well on a lap or bed, although it will still provide some cooling. The surface that contacts the laptop is a large, thick sheet of laser-machined anodized aluminum, providing serious heat-sinking even if the fans aren't able to vent fully.
The last Zalman I got was from Newegg.com. Amazon.com has them too. There is also a larger model for the 17" Macbook Pro. They come in silver and black. They cost more than the plastic ones but are worth every penny to me.