Here is the raid buff / debuff design as it stands today. I did not include Hunter pets or resistance auras. This is not set in stone.

Agility and Strength -- Death Knight, Shaman, Warrior
Armor -- Shaman, Paladin
10% AP -- Marksmanship Hunter, Enhancement Shaman, Blood Death Knight, Paladin
Burst Haste -- Shaman, Mage
3% Damage -- Beast Mastery Hunter, Arcane Mage, Retribution Paladin
Health -- Warlock (probably Destruction), Warrior, Priest
Mana Pool -- Mage, Warlock (probably Affliction)
Mana Regen -- Paladin, Shaman, Warlock (probably Affliction)
Replenishment -- Shadow Priest, Frost Mage, Survival Hunter, Destruction Warlock, Retribution Paladin
5% Crit -- Fury Warrior, Feral Druid, Subtlety Rogue, Elemental Shaman
20% Melee Attack Speed -- Shaman, Frost Death Knight, Retribution Paladin, Survival Hunter
5% Spell Haste -- Shaman, Balance Druid, Shadow Priest, Destro Warlock
6% Spell Power -- Mage, Shaman
10% Spell Power -- Elemental Shaman, Demonology Warlock, Fire Mage
5% Stats -- Paladin, Druid

12% Armor Debuff -- Warrior, Rogue, Druid, Hunter
10% Physical Damage Debuff -- Warrior, Druid (probably bear), Protection Paladin, Warlock, Blood Death Knight
30% Bleed Damage Debuff -- Arms Warrior, Feral Druid, Subtlety Rogue
30% Cast Speed Slow -- Warlock, Rogue, Arcane Mage
5% Spell Crit Chance Taken -- Fire Mage, Warlock (probably Demonology), Mage (possibly Frost)
25% Healing Taken -- Arms Warrior, Fury Warrior, Hunter, Rogue, Frost Mage, Shadow Priest
10% Melee Attack Speed Debuff -- Warrior, Death Knight, Feral Druid, Protection Paladin
4% Physical Vulnerability -- Arms Warrior, Combat Rogue, Frost Death Knight
8% Spell Damage Taken -- Warlock, Unholy Death Knight, Balance Druid, Assassination Rogue