One of the positives about an online contest is that you don't necessarily have to make a cake; you can use one that you already have pictures of, as long as it qualifies.
The contest is hosted by an online cake decorating community. The judging is done by registered members, most of whom are cake decorators; cakes are ranked on a scale of 1 to 5. All points are tallied to determine the winner. I'll let you know how I do once the winners are announced sometime after July 5.