I just used a Sanyo SR3770S for mini kegerator build. Clearly, the 4912 model is larger and better suited, but I happened to get a 3770 free. The build was very easy. It will only fit one Coke-Type Cornie keg. The Pepsi-Type is an inch too tall:
Here are some pics of build: http://www.flickr.com/photos/organize/?start_tab=one_set72157626364637116
Thats what cools inside of fridge. Don't try to move it either. It has rigid refrigerant line running to it from compressor. If you kink or break line, the unit is scrap.