Hi Curtis and Misha,
Zoe is my first yorkie, but I've had many other dogs. A couple things come to mind I thought I'd add:
I always make a point of not letting my puppies do anything that I wouldn't want them to do as a grown dog...it seems like the earlier they learn something the better.
With biting I do a triple combination, at the same time, of 1) the high-pitched "ow" yelp, 2) kind of push my finger agains their mouth/cheeks (not in a way that hurts them at all, just so it's annoying...my finger is parallel to their open mouth and I just push it back a bit until it runs into their "lips" at the back...does this make sense?) and also immediately hand them a bone. It seems to have worked so far.
Enjoy Misha! (And the chicks that are apparently soon to appear.)