This type of thing would belong here in Center Stage. If it has BrickForge and is story themed, then this is the right place. MC is right when she says the forums are pretty quiet. I tried something similar with a space theme and even further back, a medieval fantasy story. If you find that it isn't going as well as you'd like, I suggest 2 things. First, if you have a Flickr account, you might have better luck there if you have some friendly contacts. Second, I'd recommend Lands of Rowia at Merlin's Beard.
They have an established world, which I guess limits your creativity, but has some pretty cool aspects. I'm not trying to discourage you, I'm just giving you options.