I made a brooder table, on one end is this large plastic bucket square from Lowes. Placed on top of that is a hardware cloth (1/4" mesh) bracketed with wood. A regular poultry waterer is placed in the center I then run a submersible fish tank filter and constantly circulate water up to the waterer. This seemed to work pretty well for me, on good times I would only have to clean it every 2 days.
I'll have to post up some pictures this weekend when I am home during daylight hours.