"NOTE: Beta keys do not activate on NCSoft Master Accounts, you must activate it at https://register.guildwars2.com/. Limit one per household. Amazon reserves the right to change or terminate this promotion at any time. Offer will be extended to all existing pre-purchases. Game releases August 28, 2012. "
Go to the website listed above, and register with the activation key that should be located in your Amazon games library. You'll then be able to download the game client from NCSoft. When the early access becomes available on August 25th, you should be able to log right in and play. Like the response from Amazon indicated, they've already given you the early access key.....
I got my answers from Amazon yesterday. =============================================== Hello,
I've reviewed our previous correspondence with you, and I'm very sorry about the incorrect information you received. I've checked with our technical team and see that the beta key is the game key and you'll receive an early three day access that is on August 25, 2012. You'll be receiving the game code before three days <============= That's is the answer I need.