Hi,

Just wanted to drop a message that this is still under investigation, so far it only seems to affect mostly players from the Netherlands and the UK. Our network team is in contact with our partners who have confirmed that this issue is not within our network.

If we have any further updates we will let you know.

Blizzard Entertainment Europe
Technical Support

Quoted From: http://forums.wow-europe.com/thread....2572&sid=1#245
This is assumed to be caused by international undersea cables being cut.