You need to have a temporary Blizzard account to try the Wrath of The Lich King Beta version. However, there have been many questions raised about the temporary Blizzard account and so here is the complete list of the FAQ about temporary Blizzard account.
The Blizzard Account is a new way to manage your Blizzard Entertainment products and make purchases from the Blizzard Store. You can use the Blizzard Account to download and play Blizzard Entertainment games that you have registered online. The Blizzard Account will also keep track of your entire order and billing history, and save multiple addresses and payment methods for easy access. This is just the beginning of what the Blizzard Account offers, and it will expand as we continue to add more features and functions in the future. To learn more about the Blizzard Account, please read our Blizzard Account FAQ. Please note that the normal functions of a Blizzard Account are unavailable in the temporary Blizzard Account you create to log in to the Wrath of the Lich King beta.
The temporary Blizzard Account will only be active during the Wrath of the Lich King beta test. Once the beta test is completed, the temporary Blizzard Account will expire.
We plan to make the Blizzard Account the standard login for World of Warcraft beginning with Wrath of the Lich King.
There are no fees or charges when creating a Blizzard Account.
No. The Blizzard Account name is an email address, so it has to be different from the World of Warcraft account name.
No, existing World of Warcraft characters will not be affected by creating a Blizzard Account.
For the time being, you will continue to log in to the official forums and the beta-test forums (if you are participating in the beta test) using an active World of Warcraft account. Should there be changes to this process, we will notify the community.