1293 used this one in 2007 (and possibly 2008):
1293 has access to a lot of sheetmetal fabrication tools, so this was right up their alley. (The orange panel flipped up to reveal the OI.)
Ours (as in 1618's) was simpler for a lot of reasons (namely that we were short on time and unsure of our control needs), but I think it still looked pretty nice all things considered:
We have a table saw, a bandsaw, a chopsaw, a drill press, hand tools, and (because I was a USC student at the time) a plotter. We cut a piece of plywood and lexan to size, printed the board background (note the matching Capital Robotics logo--vector art is your friend), and put clear tape around the edges both to hold the lexan down and to keep us from catching an odd splinter. We could refine it further (something better for the edges would be nice, as would dressing up the bottom), but the style-to-effort factor was right for us this year.