Just a little update: Everything is out, after much fighting and a few minor injuries. I ended up getting the shaft off the disc (and tranny/diff) using a chisel and hammer to knock the little metal cuffs out. Lots of work in a tight, dirty space. Getting the bolts off involved holding a wrench on the nut with both hands while lying on my side and pushing my foot on the breaker bar to break the bolt lose. Good thing I'm flexible ... it worked on every bolt. I did have to buy a 6pt 15mm socket to get the sheared bolts off.
Damage assessment is pretty much what I thought before: Nothing catastrophic. The bushing at the front of the driveshaft was damaged so I will replace both of those. There are some minor scuff marks on the yoke of the driveshaft and tranny, but very surface. I will dab some POR15 on there to make sure it doesn't progress to rust down the road. Center support is a wreck, but I was going to replace that anyway.
One question: The grease boot on the center of the shaft was cracked and there was grease oozing from it. I got a new one, easy to install, but do I need to put any grease inside it? Manual doesn't mention it, but it also doesn't assume a busted boot.
I will be trying to complete this tomorrow if time allows before I have to go to work. Hopefully I'll remember to snap a few pictures for entertainment/educational purposes.

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