Blizzard
http://forums.worldofwarcraft.com/thread.html?topicId=25170442522

We will be performing extended maintenance on the realms listed below on Tuesday, June 8th, beginning at 12:01 AM PDT. The maintenance is scheduled for 24 hours as we prepare for the upcoming expansion. These realms will be playable again at approximately 12:01 AM PDT on Wednesday, June 9th.

All realms not listed below will undergo scheduled maintenance beginning at 5:00 AM PDT and will be available for play at approximately 11:00 AM PDT.

Rexxar

For those unaware, check your email to see if you received a beta invite from Blizzard. If not, might as well check your battle.net account and see if SC2 Beta is added to your list of games. Seeing as how thousands of invites are being sent out, chances are email can be delayed so check it out!