Animation framework

Hey,

I wonder if Rails is already or planning to get integrated with an
animation framework? It may be a javascript library or some runtime
environment like flash has.

I know a bit about script.aculo.us but besides its animated effects, I
dont see any animation library which we can use to animate anything on
the page with an effect. I think Yahoo UI has animation library but I
dont think rails developers use Yahoo UI so much.

I almost always have to use flash for the animated part of my rails
pages and that makes me feel uncomfortable with the actionscripts and
flash environmental things.

thanks to everybody