Tsubasa no Kami (and anyone else concerned),
There's a big difference between the
internal temps, and the
apparent temp of your Macbook Pro. Almost regardless of what you do, your Macbook Pro should be pretty good at maintaining specific temperatures, all within designed limit. The fans might have go into "turbo mode" to keep things that way, but it will take care of that all on its own.
That doesn't mean it won't
feel like it's going Chernobyl on you.
What I have found makes the biggest difference, beyond placing the Macbook Pro on some insulating, flat surface (large book, heck even a cutting board as has been mentioned), is to have the air
around the Macbook Pro circulating. What works best for me is a ceiling fan in the general vicinity, set on no more than its medium speed. Most of the hot air being produced by your MBP will be vented behind the keyboard, and in front of the display. Even though hot air rises, this heat tends to collect around and above the computer case. Having some air movement
above the computer will move that heat away, and allow the MBP to draw cooler air in. Since the air is drawn in around the keyboard, this type of air movement is doubly effective!
Again, it need not be much air movement, and it need not be directed right at any particular surface of the MBP. What is important is that the hot air above the MBP be exchanged for cooler air in the surrounding room. The cooler air will be more effective at cooling the inside as it is drawn in, and your fans won't have to work as hard.
Scott