1. todd answered positive to ign's question about the possibilities to ride dragon's though he added; "not in the way you think"
2. you're absorbing dragon souls, but it has been a well guarded secret as to what purpose it will serve…
3. it is confirmed you'll be able to breathe fire…now in first person in human form, a breathing-fire-animation starting from the mouth would be just strange, it's not like it's a fire spell launching from the palm of your hands that you can target…nope, it would be straight from the mouth, which would be strange, though i can see it happen when you're in dragon-form (i think there will only be a third "person" dragon form)
4. the map can be zoomed in and out, so it proves a lot of work has been done on the Y-axis…would this really only been done for a map? …or is there more…something like moving vertically…
5. when you're later in the game and lots of things have already been visited in human form, a whole new world of hidden/non-accessible places would open up to your dragon-form; high peaks enough for that!
6. 7000 stairs is a lot! would there really only be one way to access the top…only to realize you have to step down all 7000 back…transforming into a dragon at the top, would be very handy!
7. it has been done by another rpg during the skyrim development, namely Divinity 2: Ego Draconis
8. to fight the mighty Alduin in his huge dragon form, wouldn't it be logical to become one yourself?
9. what IS the true meaning of "dragon-born"? …
now, can all those points be coincidence?