Quiet that Mac

For all you Mac users out there, (at least those of you with G4s) Accelerate Your Mac has posted an article explaining how one person reduced the fan noise in his G4. This isn't just a typical replace-with-a-papst project. The author used a voltage regulator to reduce the voltage on his fan and removed some of the metal venting from around the PSU exhaust.
Nice to see some Mac-specific silencing information out there.