When HTML and CSS3 are really catching up, its the animations which need a way to go to the web without flash plugin. Fortunately we have some very promising javascript libraries out there which does this. The two must mention libraries are
Gordon : http://github.com/tobeytailor/gordon/wiki
Smoke Screen : http://smokescreen.us/

While Adobe showed a tool on this years MAX, 2 days back, which converts FLA animations to HTML5/CSS3, its time to wait and watch, when people will have access to the tool.