The problem I have with this contest is that I don't know anyone who will agree to pose for a picture that I'm going to post in an online forum contest. I wouldn't even dare to ask anyone I know and I'm not going to go hire a model.
If we were all pro photogs who work with models for a living, this would have been a good idea. But it's a bit much to expect from a group of hobbyists.
"I know rocks. Rocks are hard."