The Swift Flight Form is now available on the trainer at level 71, requiring 300 riding skill, and Flight Form learned.
Translation: druids will no longer need to do the quest chain and Heroic Sethekk Halls to get their Swift Flight Form. You will, of course, still need to pay 5000g to receive your 300 riding skill; they are simply removing the requirement for druids to do a quest chain in addition.
I'm slightly confused as to the implications for people wanting to obtain the raven mount in future - will Anzu only be summonable now by TBC druids who finished their quest back in the day? I suspect people will still want to try for this mount in WotLK so I will be interested to see whether the quest line stays - is it possible they will leave it in as a stand-alone quest simply to reward the druid with the ability to summon the boss (rather than Swift Flight Form being the end reward), or will it be scrapped entirely?
I really hope they keep the quest chain in the game. It is such a fun series of quests - it really challenges you to use all of your abilities and forms. Bear tanking, kitty interrupts, healing, shifting into flight form before you go splat, spamming your skylaz0rs - the lot. I've done it twice and I wish I could repeat it, because it really is a blast.
There should be more class-specific quests like this in the game.