I dunno how helpful I'd be from a writing-perspective, but I wouldn't mind giving input. ^^ I just need to know what you have in terms of overall setting so I don't run off and do my own thing. =p Otherwise, this project would wind up being however I envision it as opposed to whatever you had in mind originally.
Still, I would like to give your offer some more consideration first before I agree to anything, it'd be unfair to you to accept when I'm still juggling a project of my own. =(