Chris,
I did mine last year. I also struggled with the "is it worth it" question. The old bushes didn't look bad, but I went ahead, mainly out out of stubbornness. These are probably the pictures kcaboilot is talking about since it sounds like he and I used a very similar approach.
First, you need to expose the surface of that outer sleeve since its is what is stuck/frozen against the bushing holder itself. I did this the same way I did the training arms - by drilling hole after hole in the rubber in a circular pattern around the inner sleeve. you'll eventually be able to use a razor knife and pliers to rip the inner sleeve out.
Then I could use the recip saw in a sort of "router mode" to clean to remaining rubber off the outer sleeve. You'll see the technique of you try this. (There may be better ways to remove the last of the rubber.)
You are looking to get to the final result in the first picture.
begin by making two cuts close together (next pic) withe the saw. I found it almost impossible to avoid scoring the inner surface of the trunion housing by going a little too deep. It won;t hurt anything as long as you don't get into it much.
next, you can peel back the metal in between to two cuts you just made with a screwdriver and a hammer (oneof he most valuable tools combos in the shop

).
Then you can "shrink" the diameter of the bushing's sleeve by prying it away from the housing with the screwdriver/hammer.
now the hard stuff is done. I could just get ahold of the sleeve with big pliers and "reason with it" to wrench it out. there's also a little slot in the sleeve at the bottom that's up against that pesky lip at the bottom of the housing (its the reason you can't just press these out). you can just slip a screwdriver past the casting's lip to get on it and hammer away. (see one of the pics)
I don't know if all these pics will go in one post, so I'll put up the rest separately if needed.
good luck !
Cheers,
Jeff