I have a few things on my plate at the moment but this sounds like a great idea. They do something similar over on the WC forum. This might be a good opportunity to do something creative! How long will we have to work on it?
Wowza! I love it, but then, I'm a sucker for a snow scene.
This site is a site all about competitions like you are talking about. I use to frequent it, but stopped because there was some hard porn (though infrequently) that I didn't want to be subjected to. I was thinking that if you didn't know about you might want to give a look for ideas.