Digidude, I was talking hypotheticals rather than practical methods.
Re air conditioning I was thinking exactly of that, perhaps the type of unit that fits in a window or gap in the wall. Just for cooling the room.
If you already have a/c then it's not working properly. No way should you get 20-30 degF rise with a decent flow of cooled air into the room. If you have an incoming duct into the room, open the door a bit to get throughflow going. Dead-end the air flow and you have no a/c.
A poor man's a/c would be to open a window and put a fan at the window (one of those larger domestic ones, 18"), preferably opening a door to get throughput of air. Works for me! No windows or very hot outside, put fan in open doorway to get circulation.
Re water cooling, conventional pc water coolers still eject the waste heat into the room. You would have to mount the radiator outside the room so all the heat goes there. The cooling may not be so effective due to pressure losses in the long tubing. Fanless would be easier to install
Zalman Reserator.
These systems are intended for cooling the cpu. You still have heat from the rest of the pc going into the room so it's not ideal for your situation.
Any reduction in room temperature will be reflected in cooler pc temps. If you don't have over-temps in the pc needing special attention, keeping the room cool helps you and the pc.
Starman*