The png/mng groups mailing list was very instructive. But the old archives seem to be lost. There were much better suggestions than apng from persons seeming more knowledgable to me than the apng inventors. APNG was also voted down for very good reasons.
https://bugzilla.mozilla.org/show_bug.cgi?id=18574 is also interesting if you want to know how decision making processes work over at mozilla. It seems Netscape didn't go under because of evil rivals, they just aren't very good at their job.
Supporting apng is just letting the bad and (more importantly) incompetent guys win.
