Jim, I built one out of a wine fridge. Two taps. Picked up the fridge at Home Depot for like $80, and I got all the tap parts from http://www.beveragefactory.com/draftbeer.shtml Spent about $200 total. Easy to build if you want one
I also built a portable one (I had it at the 1st Round-Up). A small cooler with a 50' coil of stainless steel tubing inside. Fill the cooler with ice, and the beer runs through through the coil to get cooled down. Even in the TX summer you get cold tap beer without electicity. I'll bring it to ICBM this year.