The front page of this site is a design wonder.  It is accesible and it conveys everything you need to know about the site.  Let you mouse wander over the keys and you too can play a song.

That being said, check out how this teacher uses the content to her advantage. Instead of recreating the wheel, this teacher links to existing piano resources that fit her students' needs.

Remember, a good design can make your site more appealing, but content will make your users want to come back.