Someone above said you couldn't get one commercially for ~$100, but I just ordered the Super Chiller from MoreBeer (50' of 1/2 inch tubing with brass fittings) for $109. I can't imagine I could make one cheaper that's as nice or fits my keggle as well. When I get a pump down the road, I'll just be a small s-curve of copper away from adding a whirpool to the chiller - THAT will be cool.
Nice install Thirsty Monk! How many feet of copper is that?