Sorry but I'm not a developer. I came across this site by accident and thought you might like to hear my idea for a game I have.
I have been trying in vain to find a game about galleons and pirate wars, but have just about given up.
If any of you lovely developers out there feel that you can do this please feel free to run with it.
You should do a design doc first, get someone to a couple of meshes and textures for you, do a concept movie of your game, some sketchboards then try to get some programmers in your team.