After looking through the 3.5 version, beginning to convert it then seeing the pathfinder version had already been released. I was flipping through the pathfinder one and it looks like most of the dungeon got pretty heavily nerfed for this mac daddy mega dungeons PF incarnation, I mean hell orcus's avatar had his health cut in half, some of the old fun mobs like the CR29 demilich and illithids didn't make it due to not being OGL apparently. For the most part it seems like it'll be better then converting the old 3.5 one all the way from 3.5 to pathfinder (via updating all the monsters), but i feel like it'll definitely need some major tweaking and whatnot, I also feel like 3.5's one had more expansive maps which was nice (not so much for tabletop, but perfect for roll20 where i can size them to scale and make it pretty awesome with the dynamic lighting to block off all the walls with and judicious use of hiding things on the gm layer :P Right now im getting ready to start a way of the wicked with some friends, but im readying up Rappan as a backup or for off days when not everyone can make it (since it'll probably kill them quickly anyway :P ).