3.0.8 PTR patch notes:
- Racial restrictions on mounts have now been lifted. Night elves on mechanostriders? Tauren on raptors? You’re not seeing things.
- The white Polar Bear mount is now the proper (larger) size.
- Reins of the Traveler's Tundra Mammoth can no longer be sold back to the NPCs for 5000 gold.

New achievements rewards

• Mountain o' Mounts - Obtain 100 mounts. - Reward: Blue Dragonhawk Mount
  
• Mountain o' Mounts - Obtain 100 mounts. - Reward: Red Dragonhawk Mount

3.0.3 PTR patch notes:
Druids:
The Swift Flight Form is now available on the trainer at level 71, requiring 300 riding skill, and Flight Form learned.

Paladins:
The epic ground mount is now available on the trainer at level 61, requiring 150 riding skill, and the non-epic mount learned.

Warlocks:
The epic ground mount is now available on the trainer at level 61, requiring 150 riding skill, and the non-epic mount learned.

Items:
The Horseman’s Reings should again function in Dalaran.