There's graphics stuff, why not something for us authors? =o I know some people like reading, and I love people seeing my work! ^_^
Wouldn't 'off-topic' -> 'General Chit Chat' section do?
You could say the same thing for the artwork sections, in that case...
Than post some topics with that fanfiction and if there will be interest in it than there might be sense in creating a separate section for that.