To the surprise of absolutely no one, the patch applied earlier today has caused massive problems on many servers throughout WoW. Blizzard is aware of the issues, and is working to fix them. The problems are so widespread that Tseric mentioned in his statement that it would be pointless to list the affected realms. Ouch.
This is pretty typical on patch day, and I can only imagine the cross-realm battlegrounds make things all the more complex. My guild canceled raids for this evening, as is our custom on patch days, and I would think other guilds did as well. While I am sure Blizzard will get this figured out as quickly as they can, I am not holding my breath that all will be stable anytime soon. Sounds like a Blockbuster night at the Nelson palace. Any suggestions?