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Couple random pages...
http://us.battle.net/support/en/article/diablo-iii-beta-access-faq
http://us.battle.net/support/en/article/battle-net-authenticator-changes
http://us.battle.net/support/en/article/tracert-for-warcraft-iii-starcraft-diablo-ii-diablo-and-warcraft-ii-battle-net-edition