Watching this post Kaytee I'm having similar problems, though with a younger pup.
I am at the end of my tether with it today actually, wondering about whether I have chosen the wrong breed for us (springer spaniel). Feel we are doing all the right things (deep noise, ignore, distract, then walk away and leave her for 2 mins). I always try to go back in, calmly, only to be launched on immediately.
This just eggs her on, furiously wagging tail, nipping, snapping (biting is what it feels like) frenzied dog. I am now wearing wellies in my own kitchen. I know I sound pathetic!
A week ago she 'just' went for my DD, now she goes for DH and especially for me, first thing in the morning, last thing at night especially. So she's tired or hungry. Maybe it's the food! (skinners field and trial puppy mix).
Later today we have a trainer coming round to help us manage this better. We start puppy classes next week with this same trainer. Lola is already meeting other dogs in the park, and we are trying to take her out without too much exercise.
Anyway I'll watch responses with interest, as I'm now sure where we go from here.