Originally posted on our Technical Support forum by Davidedl: (http://us.battle.net/wow/en/forum/topic/1252366592)

Extended Support Hours from 12/6 to 12/8

With the launch of our new expansion, World of Warcraft: Cataclysm, our Account and Technical Services department will be offering expanded phone hours from Monday, 7am through Wednesday, 8pm Pacific Standard Time.

Live Phone Support:
Billing: 1-800-592-5499
Technical Support: 1-949-955-1382

In-game Support:
To create a petition in-game:
http://us.blizzard.com/support/article.xml?locale=en_US&articleId=19775

Email:
http://us.blizzard.com/support/webform.xml?locale=en_US
Edited by Auryk on 12/6/2010 5:34 PM PST