After a few hours' extended maintenance, most realms are starting to come back online. Not coming back up yet are the realms involved in the migration. At 11:10 AM PDT there was an update saying that we should expect the migrating realms (Cenarius, Cenarion Circle, Hyjal, Lightbringer, and Uther) to be down for 10 more hours. Several realms from the migration site (Blackrock, Frostmourne, Frostwolf, Khaz'goroth, Kil'Jaeden, Kilrogg, Ner'zhul, Proudmoore, Sen'Jin, Silver Hand, Tichondrius, and Vek'nilash) will be down for another 4 hours. All other realms should be online by 12:10 PTD, so within the next ten minutes or so.