I made mention of this in another thread and figured I'd snap a few pictures. Once the video camera charges I'll hopefully remember to shoot some video.
It's a pretty standard washer powered by a utility pump. QD's for cleaning both the gas and liquid lines, etc... The business end is a male hydraulic QD with the shutoff valve (basically a poppet) punched out. This allows me to clean kegs/carboys without needing to depress the valve.
To clean my beer lines I attach the female hydraulic coupling (again, shutoff valve removed) which is mated to a liquid post. After that it's only a matter of snapping on my keezer QD, opening up the tap and turning on the pump.
Oh, and before I'm asked, that's a 15.5 cft chest freezer and can hold 10 kegs.