Thanks, Gareth. I suspected as much, but wanted to confirm it.
Just out of curiosity, why do you say "subset" when you mention the possibility of implementing XSL-FO on top of APP? I would have thought that APP's capabilities would be a superset of XSL-FO, so if you took the time you ought to be able to do a pretty complete implementation. Is there something specific you're thinking of in XSL-FO that would be tricky to layer on top of APP?
--Clay