The new World of Warcraft Race Change service is now live. After purchasing a Race Change for a character, a player can choose any race of their same faction that is compatible with the character’s current class. For more information on the Race Change service, please read the FAQ, or visit the Race Change page to get started.

Race Change FAQ: http://us.blizzard.com/support/article.xml?locale=en_US&tag=RCFAQ

Race Change Page: https://us.battle.net/login/login.xml?ref=https%3A%2F%2Fwww.worldofwarcraft.com%2Faccount%2Frace-change-intro.html&app=wam

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The new World of Warcraft Race Change service is now live.

After purchasing a Race Change for a character, a player can choose any race of their same faction that is compatible with the character’s current class. For more information on the Race Change service, please read the FAQ, or visit the Race Change page to get started.

Race Change FAQ: http://eu.blizzard.com/support/article.xml?locale=en_GB&tag=RCFAQ
Race Change Page: http://www.wow-europe.com/en/info/race-change/index.xml

(Source)