Well the subject is clear... If not I would REALLY like to see a ground mount attainable through Ulduar either a guaranteed hard mode boss drop or part of some meta. Don't get me wrong the proto-drakes are awesome, but in comparison to your ground mount how long do you actually fly around.
I fly to a raid/quest hub and hearth home, that's about it. I personally spend a lot longer running in circles in a city on my ground mount opposed to flying. I am hoping for a ground mount that isn't a super rare drop. Who wants a flat mammoth or bear with goggles anymore...?