I wouldn't be a good blogger if I didn't regurgitate everything everyone else has already said so...
Behold the patch notes for 2.4.3 with some very very interesting changes.
I'd repeat them all here but instead I refer you to mmo-champion for a pre-formatted list:
Patch Notes 2.4.3
I'll let you draw your own conclusions from the patch notes as usual. If you're not in the habit of reading patch notes then take from me the knowledge that your standard mount will be available at level 30 when the patch goes live.
An interesting read I'd say.