Well, here it finally is, the full whelping story, in all its crazy (and sometimes gory) detail:
Around 5:30PM yesterday evening (Saturday, April 12th), I was becoming convinced that Mia's waters had broke. She was constantly licking her vulva and acting uncomfortable. Shortly after this, she appeared to be having contractions. She would arch her back and her tail would go up and she would strain briefly, then relax. Around 6:00PM a water sac started to appear, much to Mia's concern. At 6:04 this water sac broke (much to our dismay as she didn't want to lay in the whelping box, but insisted on staying on her large, stuffing-filled, dog bed: it was starting to get messy). At 6:05PM a second water sac appeared and broke at 6:10PM. Next came puppy #1!
At 6:14PM Puppy #1 was out, but still in its membranous sac. At this point it is supposed to be Mia's job to free the puppy from the sac and clean all the mucous off of its face (this should get the puppy breathing, very important!). She should then start licking it vigorously to clean and dry it, further stimulating it to breath, and all should be well. HOWEVER, this was not the case. First off, Puppy #1 came feet first, which means Mia was cleaning its feet, not its face. We weren't sure how long the puppy would last with its face covered, and we were eager to hear that first squeak that indicates the puppy's lungs are working, so Matt put on some gloves, jumped in and helped remove the puppy from the sac (note: scroll quickly past the next photos if you are bothered by blood). The first photo is Matt removing the sac from the pup and the second is the breathing puppy, before being cleaned up.

Mia was too concerned with cleaning herself and more contractions to worry about the pup, so Matt proceeded to tie off the umbilical cord with sterile suture and cut the cord from the rest of the sac. Then he gave the pup to me to dry off with a towel. Once the puppy started squeaking, Mia got a little freaked and moved to the fleece in the whelping box. We had read that 30-60 minutes could elapse before the next puppy would come, so we thought we had a bit of time to get situated and work with the first puppy. Boy were we wrong!
Puppy #2 arrived at 6:26PM, also feet first. Once again Mia was more concerned with herself then the moving thing that just came out of her, so while I toweled down Puppy #1, Matt assisted with Puppy #2. We were glad to hear its first squeak!
At this point, we had two puppies, alive and squeaking, one large soiled dog bed and now a soiled whelping box. Mia was beginning to freak out more and was moving from the closet to the bedroom (with light carpet). I managed to get her to settle on a towel in the bedroom, and just in time because Puppy #3 came at 6:34PM (less than 10 minutes!!!). This was just too much for Mia, and while Matt was trying to tie off the 3rd puppy's umbilical cord, Mia decided she needed to move again. She actually dragged this puppy a foot or two before we could get her settled long enough to detach the pup. Despite that, puppy #3 soon was squeaking as well and appeared to be okay, but was definitely the runt of the litter!
Based on the ultrasound, we were pretty sure we were done. Mia had settled back onto her dirty dog bed and was very agitated. We weren't ready to introduce the pups to her yet, but would need to do it soon because it is important they get the colustrum (first-milk) early on. So we tried to get some laundry done (we had a lot of dirty towels already) and worked on keeping the pups warm and dry.
We managed to get a clean towel under Mia and then we finally started introducing the pups. Mia was not very happy and didn't want to sit still. She was clearly still freaked out and agitated. Matt made a comment on how she still looked kind of big, he was expecting her to get smaller. I figured she was just retaining a lot of fluids, boy was I wrong! At 7:30PM Mia started yelping (or the shiba scream as some would call it). We weren't sure what was happening until 30 seconds later the 4th and final puppy appeared. We quickly got the clean pups off of her and back in the whelping box and onto the heating pad. Matt prepped himself to help out with the pup, but this one had come head-first and Mia didn't actually run away. It seemed her instincts were finally kicking in (or she was too weak and tired to move). She immediately cleaned off the face of Puppy #4 and took care of the umbilical cord. The pup squeaked and managed to move around enough to start nursing. Once it seemed all was calm, we slowly started introducing the first 3 pups back to her. Again she wasn't pleased, but seemed too tired to get away.

Now that all was more or less calm, we had to entice Mia into the whelping box. This was no easy task! It seems we shouldn't have let her sleep so much on her bed, because she really wanted to stay there. We moved the pups to the whelping box and tried to get her in there. It took quite a while and she really wanted to move the puppies back to her bed. We finally took the bed away to wash it and put a smaller, different bed of hers in the whelping box. This finally got her to settle down a small bit. Then it was time to check out the pups. She still wasn't sure about all these little brown furry things and was not excited about nursing. She was also still agitated (it was likely that she was still having contractions, to push out the last placenta). But we did finally get everyone feeding and got some quiet time.

Mia was still trying to figure out how to be a mom, and we learned very quickly the importance of the railing inside the whelping box. She was determine to lay on the puppies! Matt and I were concerned about her and the pups, so we took shifts staying up with her in the bedroom while the other person slept in the guest room. I took the evening to 3am shift, Matt had the 3am until . . . well . . . when I finally got up (he had had a lot of coffee!). But by this morning Mia seems to be getting the hang of it. (She did have one bout of trying to carry a pup to the guest room, she's convinced it would make a better nest under the guest bed, we quickly curbed THAT behavior). So now all is well, everyone seems healthy, the pups spend most of their time sleeping and Mia is getting better about not laying on them. Hopefully tonight we will ALL get more sleep!