A5: I don't know what is being referenced for the requirements of this build (flight extraordinary ability), but I think most would agree that as long as the flight isn't provided by a power, spell, or item, it's an extraordinary ability. Not all abilities list what kind they are (have a (Sp), (Su), or (Ex) after the name) but nonetheless fall in one of these categories, a number of feats and class features are like this. Dragonborn would be one way to get non-magical flight, but if you don't want to change your race, you could also consider my personal favorite means of acquiring flight because you can get perfect maneuverability, the winged template from page 138 of SS. Grafts would also qualify, because though they count as treasure and require magic in their creation, after their creation they are not actually magical; I would take a look at a clockwork creation from Dragon 315 page 46, Zelekhut Wings.