Lon,
I absolutely love the work you've done with the hands! They look wonderful.
My only critique, and I think some others might have caught on to this as well, is that the side of the face in the shadow looks to be a little flat. Now, I know it appears to be this way in the photo, but it's just an illusion. If you zoom in on the photo in photoshop you'll see that there is a great deal of depth in the color and shading of that part of her face. If you could replicate that subtlety, I think her face would turn out as well as you've executed the hands.
John