Patch 4.0.3a is probably going Live this Tuesday, if not the following week.  Blue posters Sammew & Zarhym posted on the official forums (HERE) to clear up exactly what will and will not be in the upcoming patch:

What’s In The Patch

• Portals in Dalaran Removed
• Class trainers in Dalaran where portals once were
• New race-class combinations (excluding worgen/goblin)
• New Gnome/Troll starting areas
• Changes to existing zones
• New cata load screens
• New cata intro cinematic
• New cata login screen
• New music
• City Quartermasters, with rep tabards
• Bug fixes
• Class balancing
• Druids, paladins, priests, and shaman will have their talent trees reset
• Experience required to gain levels 71 through 80 is being reduced by 20%
• New tamable hunter pets (Monkey, fox, dog, and beetle, as well as new skins for exsisting pet classes. Complete list here thanks to www.wow-petopia.com
• A steam powered auctioneer, similar to the engineering only one in the Like Clockwork store, has been added next to the justice point vendors in Dalaran. They are now usable by all non-engineers.