ive got a spare frozen synapse key if you want it for a prize...
I myself dont really need a prize, supremo kudos is good enough for me.
And being a default map in 1.2 is a bit of a pipe dream. I don't want a second rate map that was made in 2 months getting a place in 1.2, when there are plenty of great maps that are already out there, which have had half of a year spent on them.
However, having said that, if some of you manage to make a great map, the publicity of the competition will get you a great chance (probably the best chance) to have it in 1.2.
EDIT: Im not trying the pre judge how good your stuff will be, i just think it's a tad presumptuous to think that the map quality will be on par with non-competition maps. It might be, but we wont know until the maps are released.