With all the recent phishing sites that have sprang up with the announce of Blizzards Expansion called Wrath of the Lich King, Bornakk from Blizzard has this to say:

There is currently no Beta going on for the next World of Warcraft Expansion, Wrath of the Lich King. Should a Beta phase begin, we will post a notice on the official website.

So if you see any e-mail that says click here for beta key or anything like that, avoid it like the plague and report it to Blizzards Hack Department :
hacks@Blizzard.com

One of our readers sent us a picture of what some of you are receiving in your e-mails. If you notice the World of Warcraft is misspelled under the link as Worlf of Warcraft. If you receive this e-mail DO NOT click the link, instead forward it to Blizzards hack department noted above. If you do click the link, you will be redirect to a non-official website asking you to enter your account name and password.