Craig,
You mentioned that you are an active user of emulators on your PPC. I've been hearing a bunch of stirrings about emulators on the PalmOS side also. However, since I'm not a big fan of them I haven't tested them. SUPPOSEDLY, they are compatible on OS4 and above, et al.
If you still have your old Palm around, to go
www.freewarepalm.com and do a quick search. By the way, there is a PPC related site linked from there for MS PPC platforms, for freeware applications. Since I havne't used a PPC device in over 4 years, I haven't bothered looking at it though.
Just thought I'd mention.