Idk, I know more people who either own buisnisses or have high positions in one and use their office for allot of their production. I know, it's not fair for me or you or most others, but the where no rules about 'maximum clients' or limits on which grade hw.
If you would impose those, a contest would result in people running such high overclocks and trying to cherry pick wu's all the time.
Maybe a contest should be done in devisions with sub categories, and not with one big price but with allot of small one's. Give a price for the fastest gtx, the fastest 9600gt ( I'll enter and I know you will to toTow as I recall some numbers from the nvidia ppd thread
) and for every card. The price shouldn't be a new gpu, but how about a contest where a winner get's a custom user title for a month or so on the forums here? Or, I remember from my HWA days with vbulleting we had ribbons and awards one could 'purchase' in a store with credit one got when making posts where other people gave you positive rep for. Compare it with xbox live thropies or something. I know this forum is supposed to stay abit scientific, but I actually don't see those two sides as excluding eachother.
A good donor knows when to have fun and when to be serieus, I know it can work if allot of people want it to work. Competition is a good thing, and being able to compete against people is the whole idea about the statistics anyway. Take it one step beyond, and you'll have the ability to make it even more fun!