Someone already did it. Can't remember what site is was on. Probelm with them is they are generally not rated to handle the heat load modern CPU put out. You will end up with a system running about the same as if the rad was still there in place of the chiller.
If I recall someone was selling these on ebay a while back aswell...
Still an idea if you can find one that will have over 100watts of cooling power.
EDIT: bah, Cathar beat me to it.... :shrug:
