World Of Warcraft: Select Realms Down

Tseric tells us of a Database issue where some realms are affected in the process of fixing the issue:

Due to database issues, we are immediately bringing down the following realms to address the core concern. We apologize for such short notice and will work quickly to bring these realms back on line. We expect the downtime to be no longer than a half-hour.

Update: We're still working to correct the database issue and will have the realms available as soon as possible. We will provide an update shortly.

Aerie Peak
Altar of Storms
Alterac Mountains
Anvilmar
Arygos
Blackwing Lair
Deathwing
Demon Soul
Doomhammer
Gnomeregan
Icecrown
Jaedenar
Kel'Thuzad
Lethon
Onyxia
Sentinels
Tanaris
The Venture Co.
Uldaman
Undermine