We will be performing a maintenance on the Blizzard web infrastructure beginning at 10:00pm PDT on March 25th, 2010 and running through 4:00am PDT on March 26th, 2010. During this time, various services on Blizzard.com, Worldofwarcraft.com, and Wowarmory.com will be intermittently unavailable. The following services may potentially be affected:

Armory
Forums
Account Management
In Game Knowledge-Base
Blizzard.com support site
Pet Redemption
Beta Sign-ups