Cataclysm is live ... except not quite [updated]

Experiences seem to vary from server to server, so don't panic if you're not able to log in. You're not alone, and the problem's not on your end. We'll provide updates here and provide you with news as it develops.
Update (12:30 a.m. PST): It appears that XP gains have now been turned on. Happy leveling!
Update (12:54 a.m. PST): Blue poster Bashiok has confirmed on the official forums that XP gains are on universally, so long as you read "not" as "now." The official Blizzard customer service Twitter account says XP gains are active as well.
World of Warcraft: Cataclysm has destroyed Azeroth as we know it; nothing is the same! In WoW Insider's Guide to Cataclysm, you can find out everything you need to know about WoW's third expansion, from brand new races to revamped quests and zones. Visit our Cataclysm news category for the most recent posts having to do with the Cataclysm expansion.Filed under: News items, Cataclysm
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Is it just me or has it been a long time since Blizzard passed out some free game time? Reader Jim T. emailed me about a conversation he recently had with Blizzard's customer service -- he was disappointed with the lag, the queues, and the downtime on his server lately, and checking in about how he might get a refund or credit. The customer rep told him that while they didn't give out individual credit, they occasionally do give out game-wide credit for downtime mistakes.
When I woke up this morning I was greeted to two things: a fist full of
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