It's (probably) a girl!
Though we can't really be sure until the chromosome tests are complete, two sonograms on two continents seem to indicate that we're having a baby girl.
Everything looks good, and the baby looks healthy. And as you can see, she moves around in her sleep as much as I do.
P.S. After strolling through the "related videos" links, I see that sonogram videos could be considered their own subgenre on YouTube!