So this begs the first question: what do you think of this?
I think you need to read this: http://begthequestion.info/
But on topic, I too am skeptical of community quests. I have seen many of them fail to launch and fizzle out quickly even if they do launch. There was something similar to this and the people involved never even got to picking what sort of tileset to use.
I am NOT saying to not do it. What I will say is don't leave it too open. Give people something to decide on and don't let discussions about this and that drag on forever because it will.

