Be wary of opening some of these in your primary browser (mine crashed).

That said, these two are particularly nice: http://the389.com/works/scrollbars/ and http://the389.com/works/moire/

Yeah, the first one looks particular good on a Mac with native widgets. I think they designed that one for Aqua.

I played with this one for quite some time:

http://the389.com/works/tenori/

If you like it you should see the inspiration, the Tenori-On by Toshio Iwai. http://www.global.yamaha.com/design/tenori-on/

http://www.youtube.com/watch?v=y2SqrSh6moI

Awesome :)

One of them caused my pop-up blocker to reject 9 popups from the same page. I don't know what they were going to do, but just a warning.

It was going to open 9 popups for something kind of cool, like the rest of the site.

yeah, it was something very cool.