I’ve never heard of it—what does it do?
Do get add-ons in FireFox 3, and you’ll find it. It uses Core Animation to display web content in thumbnails in a scrollable, zoomable, grid that bends around in front of you in a big panorama. For example, YouTube shows a bunch of videos, scroll through with the ball, pick, watch, scroll, pick another, etc.
It’s just cool. I wish CoverFlow worked like this for the images and videos on my system.