I should probably give it a go, that'll be next on my to try list! Actually how do you go about colouring your stuff? like your 5sec day animation, is that one done straight into Flash? It looks so polished and nice! (I hope you don't mind me picking your brain for a little bit, I'd really like to learn how to do more stuff!)
i often just animation the fx using color first, and just animate the silhouette first. then i do a few passes on shadow, high light, different layers of flame color. takes a bit tracking, but its easier than to do it all together.