For those that don't know there's a item called Mysterious Egg that is obtained by getting revered with the Oracles, this egg hatches in 3 days and has a chance to get you a rare mount or a pet. So, how will this be a gold mine?
In Cataclysm people won't be supplying the AH with the pets that hatch from this egg, there's probably going to be a new set of 25 daily quests that reward more gold and more valuable reputation, so anyone that isn't revered with Oracles on Cataclysm Launch probably won't be getting revered.
Just thought I'd throw this out there, as I haven't seen it mentioned.