I have just tried out the new preview release of the Adobe Edge tool and created an animation based on HTML5. As I have posted earlier that Adobe has this thing called Edge with which you can do stuff like Flash, you can add tweening animations, effects, move the objects, ease out, ease in and do a whole lot of stuff. What you can do is that you can download the preview version, its free but only for 142 days, that sounds enough to get you going and may be complete a couple of projects within the time limit. The animation runs in all the latest version of browsers. Some cool stuff can be done. Check out the animation here
Here is a video to get you started: Edge closer look by Adobe Fellow Mark Anders