Current state: It works more or less in Firefox4, Chrome, Safari, Opera, but there are some differences in the visuals. Other known issues are:
- Chrome on Windows has a known box-shadow bug where the circles don't get cut off, no panic, should already be fixed in the nightly.
- Opera starts to rotate funky after the first round, no idea why.
- On iOS the many gradients and box-shadows make the transition slow. It might would need some simpler styling.
- Plus there is no proper fallback for older browsers. A Modernizr and Flash combo should do it.