We took Genji to the critical care facility (3 blocks from our house, which is nice) on Monday, where the veterinarian promptly told us in effect, "Most cats with injuries this severe don't survive, in particular, the window between 3 - 5 days is particularly perilous, since that's when the infections start raging. Only about 30% of cats would survive this."
We decided to see how Monday went. We visited him and he meowed a few times, but didn't really get up -- although he tried to jump out of the kennel! On Tuesday he was a little worse, and didn't stay awake very long. I wasn't able to get away from the office on Wednesday, but Scott said he was about the same as Tuesday and he did try to knead Scott's arm a little. They said there was a little fluid in his lungs and some necrotic tissue somewhere.
This morning the vet called around 10 a.m. We were expecting her to say that he'd died during the night, but she said he was slightly better, and she was very guardedly optimistic. He still isn't eating, and she said he'll need at least another week in the hospital (assuming things don't get worse.)
I'm taking off work a bit early today to go visit the little guy -- it seems to cheer him up to see us, and I think it will cheer us up to see him doing better.