Patch 3.2.0 (2009-08-04):
Mount changes.
The cast time for summoning any ground mount is now 1.5 seconds, down from 3 seconds.
Apprentice Riding (Skill 75): Can now be learned at level 20 for 4. Mail will be sent to players who reach level 20 directing them to the riding trainer.
Journeyman Riding (Skill 150): Can now be learned at level 40 for 50. Mail will be sent to players who reach level 40 directing them back to the riding trainer.
Expert Riding (Skill 225): Can now be learned at level 60 for 600 from trainers in Honor Hold or Thrallmar. Faction discounts now apply (Honor Hold for Alliance; Thrallmar for Horde). Flight speed at this skill level has been increased to +150% of run speed, up from +60%.