Actually your idea is rather interesting and it might spark an idea for a project. I wonder if you'd be so kind to post the code.

I'm running with the idea of a "Contest" channel and have it so that people will only upload their contest entries to this channel (but not have the channel listed on the "channels" page [if it's possible to have hidden channels...I'll be doing a forum search to see if it can be done]) and have people vote for their favorite. Not sure yet how I'm going to work that out, but it's on the drawing board.