The Flash version used to have a plugin for Dynamic Props which allowed you to continuously update the properties. Is there something like that for the HTML version?
Even being able to simply call TweenMax.updateTo(targetObject,.5,{property:newPropertyValue}); would be awesome... The problem is when it completes, you can't call updateTo again. Instead, you need to check to see if it is tweening and call updateTo() or if it stops call to().
It would be great if updateTo would simply create a new tween if it already finished.