Got the shaft out of the hub today! A lot of people were giving me pointers on how to get this done, so I tried several of them in combination. Ed Hutchings, in particular, suggested the dual hammer trick, so that combined with the air hammer and copious amounts of lubrication seemed to do the trick. I had hoped that alternating between bashes with the hammer and the vibration from the air hammer would do the trick, and sure enough...
Well, I'm going to finish up with the passenger side completely before tackling the driver's side. Just in case I forget where something goes, I would to have one side put together to refer back to....
Whew! Thanks, everyone for your help and encouragement...