I think we need to focus more on the freelancing forums than the marketplace at this time, spend some money and offer some contests...give some incentive to start posting and being more active.

As far as a charge to list items, Talkfreelance does not have the resources and traffic to warrant a fee.

It would be very unprofessional to judge designs to be chosen, even if you picked a group of people who were qualified who's right is it to say something is good and something isn't, it would offend more people than do good.