If you missed the most important blue post last week, this is the one. Many upcoming changes to the racial abilities will occur with the release of Wrath of the Lich King.

Quote from: Kalgan (Source)

Changes that should be in the next beta push. Bear in mind that some of these may change somewhat or entirely, and there may also be other changes coming in subsequent pushes:

Orc
- Hardiness now reduces the duration of stun effects by 15%

Troll
- Racial Passive "The Voodoo Shuffle": Reduces the duration of all movement impairing effects by 15%. Trolls be flippin' out mon!
- Berserking: no longer has an activation cost of energy/rage/etc

Draenei
- Gift of the Naaru: The amount healed is increased based on the caster's Spell Power or Attack Power, whichever is higher. This ability does not lose casting time from taking damage.
- Shadow Resistance: reduces the chance to be hit by Shadow spells by 2%

Dwarf
- Frost Resistance: reduces the chance to be hit by Frost spells by 2%
- Racial Passive "Mace Specialization": Expertise with Maces and Two-Handed Maces increased by 5.

Undead
- Shadow Resistance: reduces the chance to be hit by Shadow spells by 1% (yes, this is lower than the other resistance racials)
- Will of the Forsaken: removes any fear, sleep, or charm effect (no longer has a lasting immunity).

Night Elf
- Quickness: reduces the chance to be hit by melee or ranged attacks by 2%
- Nature Resistance: reduces the chance to be hit by Nature spells by 3%

Tauren
- Endurance: now scales based on base health, to be tuned to approximately a 5% heath increase if the player were wearing green quality gear
- Nature Resistance: reduces the chance to be hit by Nature spells by 2%

Gnome
- Escape Artist: the freeing effect can no longer be resisted
- Arcane Resistance: reduces the chance to be hit by Arcane spells by 2%

Blood Elf
- Mana Tap: ability removed (partially integrated into Arcane Torrent)
- Arcane Torrent: restores 15 energy, 15 runic power, or 6% of mana to the Blood Elf (along with the current 2s silence effect)
- Magic Resistance: reduces the chance to be hit by spells by 2%

Human
- Perception: changed to a passive, now grants one character level of passive stealth detection
- Racial "The Fall of Humanity": Feign death which may trick enemies into ignoring you. Any threat is restored versus enemies still in combat upon cancellation of this effect. 5min cooldown
- Racial Passive "Human Supremacy": The dominance of Humanity is evidenced by having one more racial bonus than normal. Actually, make that two counting this one. (just a tooltip, no actual functionality)
- The Human Spirit: spirit bonus lowered to 5%

Note: this is a list of changes/additions, not an exhaustive list of all abilities. Racial abilities not mentioned here haven't changed (or are ones I forgot to put on this list).