Ends up the nurse was so excited about how cute the babies looked when they started the ultrasound. They were facing each other like bookends and seemed a lot bigger then last time we saw them. Her deal was to push and prod my wife's stomach to get them aligned correctly so they could do the picture / measurements. One very cool comment: "When you come back at 16 weeks, we won't be able to get them in one picture anymore."
Regarding heartbeats: one was at 168 and one at 143. Of course my wife got worried and the nurse said "shoot - they change every minute. One could be sleeping; one awake; whatever. As long as they're between 100 and 200 everything is ok." It brought to me a cool realization: do you ever think that your unborn children are sleeping and waking up. Wow -- so cool. I guess i always thought about them just sitting there growing... but nap time in the womb. How cool. We could all be so lucky :)
I made a new pic for you -- brought two together in Illustrator.