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ANet has just updated their support section on regional designations.
Guild Wars 2 Beta Support | Regional Designations FAQ
I travel frequently. Will I be able to play Guild Wars 2?
Yes. The one-time verification system simply confirms that you have purchased the correct version of the game for your area of the world. Once that has been confirmed, you may play from any location you desire.
Does this means they have done away with region locking?