CSS3 Transitions Without Using :hover

I hope I'm not unfounded in saying that there seems to be a trend developing where we're trying to ply out of CSS novel and interesting ways to define the behavior of a page. But doesn't that parallel the issues surrounding visually oriented markup in HTML (i.e. defining the font, background color, etc.)? HTML is for structure, CSS for presentation, and Javascript for behavior, no?

Apart from my concern, the results are impressive as well as appealing.

I wouldn't really call transitions behavior considering that they don't change the state of the page, and degrade gracefully.

Now, CSS3 animations might be a different kettle of fish entirely, I haven't looked too closely at them.

Was pleasantly surprised to see that :focus and :active sort of work in IE8. IE7 none.

This is a really top notch article.