SPCR

I think an oil based system has potential:

http://www.pugetsystems.com/submerged.php

Solid-State PSU Cooling: Beyond the Pail!

viewtopic.php?p=15948#15948

viewtopic.php?t=26334&highlight=oil

viewtopic.php?t=28267&highlight=oil

viewtopic.php?t=21990&highlight=oil

fun to experiment with but not really practical IMHO. plus you have to keep the hard drive open to the air, and HDDs are a major source of noise unless you use 2.5".

The Puget computer uses a Venus HDD enclosure. I use one and while it's quiet, it's not silent.