Yes it will be up soon.
The servers are down for now.
Coming from B.net:
USEast/Azeroth 24hr Maintenance 6/21 06/18/2012 12:08:36 PM
Following successful testing of the new USEast/Azeroth hardware, we’ll be migrating existing game data to the new hardware this week.
10:00 a.m. PDT, Wednesday June 20 – 10:00 a.m. PDT, Thursday June 21
Expected ~24 hour maintenance duration
Please be aware that this is the currently scheduled maintenance period, and it could be extended if additional time is needed.