> I had to save the first one and look at it through
>a viewer known not to support animated GIFs before
>I believed it wasn't one.

Heh. Just hold your hand over part of it so you can't see the rest. The one you're looking at will stop moving. Or, alternately, just stare at one of the black dots. The circle you're looking at will stop moving, and eventually, the rest will too once your vision fuzzes a little bit.

Cool stuff.

-- Dave