As much as I dislike Nike, I have to admit that this site is designed really well. I'm still trying to figure out what is so cool about it (as well as how they've made it feel so natural), it must have something to do with how it feels interactive, although all you're doing is moving the mouse.
I don't agree with all of the message on this site, but it's definitely worth having a look. The simplicity of the site is really what drives the message, there's nothing else there to clutter it up- love it. Check out the site here- Nike Better World. Don't get stuck watching the video, scroll all the way down first.