<< I'll second Kami, you can't get a case temp under room temp with conventiona fan cooling. First off, its room temp air going into the case, and secondly, everything in a computer creates heat, be it a little mb resister, every little thing adds up. >>
Like I said before, he's probably liquid cooled. Or maybe he has a small air conditioning unit and is running a duct from it to his case, that works pretty well