Holy moly, how awesome that Justin and Mary are doing a shoot out during WPPI and they are doing it for free for 20 people, wow.
I would LOVE LOVE LOVE to go.  This is my first year going to WPPI.  I feel fortunate that I am able to go, made alot easier by the fact that I live in Las Vegas.  I have been shooting professionally for a little less than a year now and am completely self taught.  I am happy with my progress and what I have learned, however, I wonder sometimes how much more I would learn if I actually got to go to a class, a workshop, or in this case a shoot out with 2 of the most amazing photographers out there.  Their work is truly amazing and inspiring, I would love to even just go and watch, getting to bring my camera would be icing on the cake.  Either way, I am definitely going to their Platform class.
Whoever wins, your going to be in for a treat I am sure.