Hey Gary...

Remember when we were talking about circulating coolers for the CPUs? Check this out:

http://cgi.ebay.com/ws/eBayISAPI.dll?MfcISAPICommand=ViewItem&item=3102186423

It will cool down to -15C, and has a circulating pump. You could daisy chain several PCs with this thing, and it is a lot less than the earlier links I gave you to VWR...