smcFanControl is a little application that lets you set the minimum speed of the internal fans, when the temperature sensor indicates that the fans should come on. This should allow the computer to run cooler. smcFanControl works on MacBooks, MacBook Pros, and Intel Mac minis.
I am not running this on my laptop, as I would rather have the fan spin slower, to keep it quiet, but I am running this on out Mac mini, to keep it cooler in the entertainment center.
[via Slashdot: Apple]