CSS3 Transitions available on Firefox 3.7

“Javascript is not anymore required for simple animation.
Specifically, we don’t need Javascript to manage animation with setInterval or with any library like jQuery.animate : Forget the animation management, stay focused on the real work.
In this article, I will try to explain why and how using css3-transition with some examples.”

Great article that explain step by step about CSS3 Transitions also showcasing how these properties rocks.
Read the tutorial.