A MacRumors forum post by Rokem details a hack for the MacBook Pro fans that can significantly reduce its operating temperature.

Now my processor is 40-50˚F cooler… battery life is maybe 5 minutes shorter, and the fans are not all that much louder.

(Clarification: Reader Michael Booth notes that Rokem appears to have looked up the temperature conversion in terms of absolute values… 40-50˚F is actually 22-28 °C.)
Rokem achieved the temperature reduction by modifying the plist files in AppleBlower.ktext and AppleFan.ktext. Essentially, he edited the speed values for both fans so they kick on a little sooner and run a bit faster.
Read the rest of the story on my ZDNet Blog: The Apple Core.

A MacRumors forum post by Rokem details a hack for the MacBook Pro fans that can significantly reduce its operating temperature.

Now my processor is 40-50˚F cooler… battery life is maybe 5 minutes shorter, and the fans are not all that much louder.

(Clarification: Reader Michael Booth notes that Rokem appears to have looked up the temperature conversion in terms of absolute values… 40-50˚F is actually 22-28 °C.)
Rokem achieved the temperature reduction by modifying the plist files in AppleBlower.ktext and AppleFan.ktext. Essentially, he edited the speed values for both fans so they kick on a little sooner and run a bit faster.
Read the rest of the story on my ZDNet Blog: The Apple Core.