Priests in World of Warcraft are a little different than other classes. Each priest has access to two special abilities that are unique only to their race. These are separate and apart from the racial traits available to all players.
During patch 1.10 these were updated. Here's warcy's summary.
The question I have right now is... what will the Burning Crusade (Draenei & Blood Elf) Priest racial abilities be?
Racial Abilities: Stealth Detection, Spirit +5, Faction Point Gains, Sword/Mace Specialization
Racial Abilities: Stoneform, Guns +5, Frost Resistance +10, Treasure Finding
Racial Abilities: Shadowmeld, Dodge +1%, Wisp (speed increase) when Dead, Nature Resistance +10%
Racial Abilities: Blessing of the Naaru (HoT), Chance to hit +1% (to party), Jewelcrafting +15, Shadow Resist +10.
Racial Abilities: Fear Immunity (w/ cooldown), Cannibalize, Underwater Breathing +300%, Shadow Resist +10.
Racial Abilities: Berserking, Regeneration (passive), Beasts +5% Damage, Throwing Weapons +5, Bows +5
Racial Abilities: Mana Tap, Silence, Enchanting +15, Magic Resist +5
We've got a tease now of what we might get in the Burning Crusade:
Fairly soon (yeah, yeah -- you hate that term -- but seriously, not much longer now). I will say this though, just so you walk away with one new piece of knowledge -- each will get one brand new ability, and one that already exists in-game now among the existing available races for the priest class.Source: Eyonix Post via wowinsider.
Drysc in the Forums says:
I think the general consensus among the designers is that ultimately priest racials were ... a poor choice to make, especially with the decisions of what each race would have. It's come down to it that they should be addressed somehow.
I'm not sure how many remember, but priest racials were created because there was player concern over how an Undead could appropriately wield the healing powers of the light, and the racials were added to give flavor which could back up some of those player concerns. Aside from some probably poor decisions on what that flavor should be, ultimately it was a concern that players would ultimately have benefited from if we had simply ignored it.
It could be addressed any number of ways (everyone is given everything, or it's cut down to a small pool of abilities which everyone has access to, or only specific abilities are passed to different races, etc.), and I don't believe a final decision has been made at this time.
Quote found via wow.warcry.com.