It seems to be an unfortunate reality of WoW, if not MMORPGs in general: When a new patch goes live, more often than not, it's going to be a bit rocky on the servers for a while. Patch 2.4.2 is no exception, Many servers are having trouble staying up, including most of the Ruin Battlegroup, which according to a few our tipsters has been having more than its share of trouble lately. Blue Poster Vrakthis has assured posters on the Customer Service Forum that the Realm issues are being looked into, but so far, there does not seem to be a solid reason for the downtime other than, hey, it's patch day!
EDIT: It has now been confirmed that the downtimes were intentional for the purpose of emergency maintenance. The downtime should be minimal.
As of the time of this writing, the following servers are down:

We don't know for sure yet if
Playtime credits: they're not just for European realms anymore! Blizzard must have been reading the comment thread for my post on the
As of 10:50 AM PDT, 1:50 PM EDT, Blizzard has brought down all the realms in the Bloodlust (US) battlegroup for brief maintenance "to address issues relating to high latency and disconnections." The affected realms are expected to be done after about an hour, which means they should come back up around 11:50 AM PDT/2:50 PM EDT, which is in twenty minutes.

...and 
Starting at least half an hour ago, and continuing through to now, 36 US realms, comprising the battlegroups Rampage and Shadowburn, are down. Blizzard notes that they are "currently unavailable and are being worked on," and that they don't have an ETA right now, but will give us an update around 8:50 AM PDT/11:50 AM EDT. So we should hear more about this in 15 minutes or so, at which point I'll update the post with any new information.
A bit over a month ago, all the realms in the European battlegroups Crueldad, Hinterhalt, Némésis, and Nightfall suffered some extra downtime, and players on them
In yet another sure sign that we're all ready for the refreshing changes that 

A fresh popup from the in-game breaking news section tells us that the extended maintenance has been extended until 12:30 p.m. PDT. They are hard at work getting 











