I was at a local park today and saw a setup for kids gaming of Dance Dance Revolution. The amazing thing with it was the fact it accepted and displayed input for 32 simultaneous dance pads.
I found it quite interesting to see how it could handle so much simultaneous information being inputted. The real amazing factor though was how well the information was projected on screen. For 32 individual players on-site, you could quickly see how each player was scoring. It was impressive to see such a clean design.