I've been talking with Dr. Saguil about Navy/Air Force waitlist movement for anyone who's interested. He (obviously) didn't give out exact details, but both lists are moving slowly, with a bit more movement in AF than Navy. The Navy list is still pretty long (it was around 60 a month ago), but they've run through a portion of the AF list. They've also added a few hold students to the end of the waitlists, so the exact numbers keep fluctuating.
As for me, he said I've moved up the list a little, but there are still a bunch of people ahead of me. I went from the bottom third of Navy's list to the bottom of the middle third. He asked if I wanted to switch to the AF list, where there has been more movement. I've got a really strong Navy preference though, so I told him I would prefer to stay where I am for now. Maybe I'll change my mind in the coming weeks though if the navy list totally stalls out.
He said the next two weeks should really be telling about how the waitlist movement will continue to go, and that I should hold off on judging my chances for a while yet.