Take a look at these examples:
Hobo Lobo of Hamelin
A infantile storytelling website. Uses parallax and horizontal scrolling.
Ben The Body Guard
Creative hotsite for a "phone data protector". Uses vertical scrolling. It looks even better on the iPhone.
20 Things I Learned About Browsers And The Web
Browse and animate pages like a real book, has a nice summary.
It was created by Hakim El Hattab, who has some nice HTML5 and WebGL experiments on his website.
Nike Better World
Another creative hotsite, created by Nike. Uses vertical scrolling and parallax effect.
Not so cool on the iPhone, but it still navigable.
Parallax give to the user a much immersive way to scroll the page. But it surely have to be well-designed.
Have a nice coding!