Most of you have probably already seen some of this, but to those that haven't, "oh snap!" comes to mind. This isnt a comprehensive list, just a few things that have been confirmed by Blizzard CMs -
General
�Mobs inside Sethekk Halls will now award Lower City reputation all the way into Exalted
�The number of creatures that must be killed in the Karazhan Servants Quarters before a miniboss spawns has been reduced
�New Daily quests for heroic and select non-heroic instances
�New Daily quests targeting a random battleground each day
�Healing Reduction effects now affect all Drain spells and abilities (i.e. Mortal Strike vs Drain Life)
�Level 20-60 Quest EXP has been increased, while EXP to Level has been decreased
�New Title - Champion of the Naaru: Awarded to those who complete the Tempest Keep attunement quest at level 70
�New Flying Mount added. Requires 2,000g and Exalted with Cenarion Expedition
�New 10-Man Raid - Zul'Aman!
�Guild Banks!
�New Arena Relics have been added for more talent specs, and existing Relics have been renamed to create a more consistent naming convention
�1/3rd of +Healing will count as +Dmg
PvP
�Spells now cast for free before a Battleground begins
�Spells now cast for free for 5 seconds after resurrecting at a Spirit Healer in Battlegrounds
�Additional Honor is rewarded upon conclusion of Warsong Gulch, Arathi Basin, and Eye of the Storm
�New Battleground rewards: Boots, Belt, and Bracers
Mages
�Detect Magic removed. All players may now see their target's beneficial effects at all times
�Frost Ward and Fire Ward now gain additional benefit from +Dmg
�Frost Ward and Fire Ward (Ranks 5, 6) have had their base absorb lowered
�10% coefficient tax removed from Improved Fireball and Improved Frostbolt
�New Spell - Ritual of Refreshment: Allows players to pick up food/water
�Evocation now restores 15% of your total mana each 2 seconds
�Arcane Meditation increased to 10/20/30% mana regeneration
�Ice Barrier will receive additional benefit from +Dmg
�Ice Barrier (Rank 5, 6) have had their base absorb lowered
Shamans
�Item - Tidefury Raiment now grants additional mana to Water Shield
�Item - Totem of the Tunderhead now grants additional mana to Water Shield
�New Talent - Shamanistic Focus: After landing a melee critical strike, you enter a focused state. The focused state reduces the mana cost of your next Shock spell by 60%
�Lightning Overload now has a 4/8/12/16/20% chance to proc
�Lightning Overload damage has been decreased by 50%
�Lightning Overload now causes 0 threat
�Mana Spring Totem now restores mana at a rate of 20 mana every 2 seconds
�Water Shield now costs 0 mana to cast, and the mana per globe has been substantially increased
�Water Shield's duration has been reduced to 1 minute, and grants mana for each globe left upon ending
�Elemental Focus will now reduce the mana cost of your next two damage spells by 40%
�Lightning Bolt casting time reduced to 2.5 seconds, and mana cost decreased
�Chain Lightning casting time reduced to 2 seconds, and mana cost decreased
�Lightning Mastery reduced to .1/.2/.3/.4/.5 seconds
�May equip 2-Handed Axes and 2-Handed Maces without spending talent points
�Frost Shock no longer has Diminishing Returns
�Shamanistic Rage will reduce damage taken by 30% in addition to it's current effects
�Spirit Weapons will reduce melee threat by 30%
�Mental Quickness adds 10/20/30% to +Dmg and +Healing based on your total Attack Power, in addition to it's current effects
Druids
�Tranquility now receives added benefits from +Damage and +Healing
�Cure Poison and Abolish Poison may now be cast in Tree of Life form
�Remove Curse may now be cast in Moonkin form
�Rebirth cooldown reduced to 20 minutes
�Intensity increased to 10/20/30% mana regeneration
Warlocks
�Banish may no longer be cast on targets tapped by other players
�Ritual of Souls has had it's casting time significantly reduced
Warriors
�Weapon Mastery has been changed to reduce the duration of Disarm effects by 25/50%
�Mace Specialization proc has been reduced
�Mace Specialization Rage increased to 7
�Tactical Mastery now greatly increases threat from Mortal Strike and Bloodthirst while in Defensive Stance
�Devastate now combines the effects of Sunder Armor into it's effect, and is affected by all talents and items that affect Sunder Armor
Priests
�New Dwarf/Draenei ability - Chastise: Causes Holy damage and incapacitates target for 2 seconds
�Fear Ward will now be available to all Priests at level 20
�Fear Ward duration reduced to 3 minutes, and cooldown increased to 3 minutes
�Power Word: Shield will receive additional benefit from +Dmg and +Healing
�Power Word: Shield (Rank 10, 11, 12) have had their base absorb lowered
�Pain Suppresion may target Friendly targets
�Pain Suppresion reduces Friendly target's threat by 5%
�Pain Suppresion reduces Friendly target's damage taken by 40%
�Pain Suppresion cooldown reduced to 2 minutes
�Meditaion increased to 10/20/30% mana regeneration
�Prayer of Healing gains additional benefit from +Dmg and +Healing
�Circle of Healing gains additional benefit from +Dmg and +Healing
�Circle of Healing's base healing has been reduced
�Holy Nova (Healing only) gains additional benefit from +Dmg and +Healing
Paladins
�Pursuit of Justice now increases speed by 5/10/15% and reduces chance to be hit with spells by 1/2/3%
�Vindication now reduces all sats by 15%, while proc rate and duration have been increased
�Exorcism's mana cost has been lowered
�Holy Wrath's mana cost has been lowered
�Hammer of Wrath's mana cost has been lowered
�Vengeance has been increased to 30 seconds
�Improved Seal of the Crusader effect added to base abilitiy
�Improved Seal of the Crusader now gives the effects of Sanctified Crusader
�New Talent - Sanctified Seals: Increases your chance to critically hit with all spells and melee by 1/2/3%, and reduces the chance your Seals can be dispelled by 33/66/100%
�Crusader Strike cooldown is being reduced to 6 seconds
Rogues
�Poisons now enchant weapons for 1 hour
�Fleet Footed increased to 15% speed increase
�Deadly Throw travel speed is being significantly increased
�Deadly Throw snare duration is being slightly increased by 1 second
�Deadly Throw no longer triggers Ruthlessness
�Ruthlessness now only affects melee Finishing Moves
�Blind no longer requires a reagent
�Blind is now a physical attack
�Blind now shares the Diminishing Returns of Cyclone
�Blind is now affected by Diminishing Returns in PvE
�Shadowstep may now be used while not in stealth
�Shadowstep reduces threat caused by your next Ambush, Garrote, or Backstab by 50%
�Shadowstep cooldown increased to 40 seconds
�Dirty Deeds increases damage of special attacks by 10/20% against targets below 35% health
Hunters
�Wyvern Sting is now instant cast and has a maximum duration of 10 seconds in PvP
�Arcane Shot (Rank 6+) will now dispel 1 Magic effect in addition to damage
�Trueshot Aura no longer costs mana to cast, and will last until cancelled
�Serpent Sting, Immolation Trap, and Explosive Trap gain additional damage based on 10% of your Ranged Attack Power
Engineering
�New Recipe - New Field Repair Bot: Dropped(?) by Gan'arg Analyzers in Blade's Edge Mountains
�New Field Repair Bot is able to buy/sell
�Flying Mount added for Engineers; Regular and Epic version
Fishing
�Fish Tracking may be learned from a journal, fished from crates
�New fish added near Karazhan and Zul'Aman
Cooking
�New Daily Quests
�New recipes added for fish found near Karazhan and Zul'Aman
Enchanting
�Duration of Wizard and Mana oils has been increased
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