Thanks, all, for your well-wishes. I read them all (including 66 posts from Facebook) to him today.
He was up a bit today and was walking very slightly better. It ain't great, but it's better than nothing.
Long story, but he had to stay one more night (tonight) in the hospital so that he'd been in for 72 hours - if you're not in the hospital for at least 72 hours, Medicare doesn't cover future nursing home care. Amazing how the government can still manage to spend $10 to save $5.
I think he will be discharged from the hospital tomorrow, to a nursing & rehab center in town. I'll keep everyone updated as things progress.