Here is a suggestion. Why cant we vote? The organiser can choose 5 and Norman can choose 5, then post them for everyone to see (without their names), and then we can all vote for the winner. Because you can be guaranteed that someone out there will complain that THEY didn't win so it must have been rigged.
To the dude organising it... I hope it doesn't become too much of a problem for you, and I hope it goes well. I think you are a very generous and brave person to take this on.