Hi Thomas, obviously got that one all wrong...

since you're using joints - have you hidden their parent or are they just single joints with locators attached?

will you be using blend shapes after you've weighted your model?

I gave up using bones for facial animation finding it difficult to use paint weights to weight. I use a combination of clusters and very basic bones to make blend shapes.

Your method of using a multitude of little bones looks similar to the effect of using clusters. Or is there a big difference?