1.) The only place I've ever found Ayu stuff was in a little store called Yu Yu's Oriental Supermarket where I used to live. They had some horrible bootlegged Ayu cd's. Other than that, I've never run across Ayu anywhere...
2.) My friends never call her Chinese, they always know she is Japanese. Of course, sometimes someone will try to immitate the Japanese language, but its usually really an imitation of Chinese. That's what annoys me.