Basically what we say here is that if you havnt done anywork other than thought of the idea we slap you.
also if your game hasnt got a line of code we slap you
also unless there is some concept art we slap you
also if you dont have something we can atleast play we will slap you
also have a damned good original idea or we will slap you
you getting the idea now/
get your project almost complete so its a playable game with place holders, do some concept art of the stuff you require, have some sort of story ( does not apply to games like asteroids, pacman etc).
Basically creating models for a complete game takes a hell of a lot of time, each model can take upto 2-3 days, characters 2-3 weeks, we aint gonna waste our time if you havnt put in the sweat as well, there have been to many of these requests in the past in which modellers have spent weeks creating stuff for the game not to be finished.
also check here
http://forum.thegamecreators.com/?m=forum_view&t=68699&b=3