#3 - Oct. 27, 2010, 4:36 p.m.
I can understand your confusion, Manami, so let me try and clarify.
The email you received regarding a change being made to the account does sound like a phishing attempt. I checked the account to be certain and I do not show this account being flagged for the Cataclysm beta. I can confirm, though, that the PTR client was added to the account today.
Players will begin to see the green arrow with the “Cataclysm Upgrade Available!” message in preparation for the Cataclysm pre-orders.
http://forums.worldofwarcraft.com/thread.html?topicId=27397541848 Q u o t e:
With World of Warcraft: Cataclysm coming December 7, we're pleased to announce that for the first time, you'll be able to pre-order the expansion from the Blizzard store, download all of the installation DVD's content in advance, and start playing the moment we turn the servers on at midnight, Pacific time, on December 7. Pre-orders will go live soon, so stay tuned to http://blizzard.com for more information.
I hope this helps to clear up any questions or concerns you may have had.