Yep, it works, thanks for the suggestion. I will look into it more soon, but like some of the previous examples, it seems to only work with a single light source. It's an effect given to a sprite, it auto-calculates the normal-map, and then uses a single light source position to perform the lighting. There doesn't seem to be a way to introduce more lights. A single light can be used to do some great things, but not the thing I have in mind.
Is it, I wonder, possible to use the javascript capabilities in this regard to use the canvas or some other means to achieve multi-light, normal-map, dynamic lighting on sprites?