Congrats! I just built the 38DD mother of fermentation chiller, seen here http://www.wortomatic.com/.
Basically the same thing it just holds two carboys. I love it, very efficient and works great. Once you get the temp. stabilized it hardly runs at all. Temp. control is a beautiful thing.
Irish Hills Brewery
Primary #1 - Apfelwine #1
Primary #2 -
On Tap - Abbey Road ESB
Next up - Belgian Dark Strong, Apfelwine