Water-Cooling Kits as Temp. Control for Photography?

Katboy asks: "Hi, I have a project that I want to work on that some of you overclockers might be able to help me with. I'm an amateur photographer. I have a home darkroom, (not interested in going digital just yet) and I live in Texas, where the water temperature is usually a bit high for developing film. The method of using ice to contol water temperature is messy and irritates me, and I can't find a cooling system that I can afford that would be useful to me. So I need to build one that can produce a steady steam of water at about 69 degrees Fahrenheit. Some of the cooling kits from places such as waterchill.com and athlonoc.com look promising, but but I don't know how I might incorporate a thermostat into the setup... (this water will then go down the drain) Any insight would be appreciated." Now this is thinking out of the box. I like the idea of reusing water-cooling kits in such a manner. How difficult would it be to wire a thermometer to such a setup, and what other uses might you have for a device like this?