Thank you for the song. Dad loves music, and I've inherited his old Cream 45" from when he was a teenager, so this fits.
I wish I had more to update. In a nutshell, he's got a long road ahead of him, as he's dealing with a lot of concurrent issues at once. He is being transferred to a long-term acute care hospital sometime today. There, he can receive the care he needs that the ICU isn't really equipped to do for an extended period of time. The main thing that they have been trying to do is stabilize his blood pressure and breathing, and we are hoping that this other facility will be able to help with that.
I wish I could tell you all more. I apologize for being vague, but I'm trying to maintain some privacy for my dad since this is a public forum. Those of you who know my dad on a more personal level will probably understand what I mean.
Thank you all for the thoughts. He considers you all his friends, even though you have never met.