Community Service Warning
There are constant attempts to get your account information (and other privacy and money information). The latest is going to get a lot of suckers, and hopefully I can help you miss it.
It appears to be an offer for you to be a beta tester for Wrath of the Lich King. (To see it, see the offer BRK got. )
Issuntril, an official voice of Blizzard posting on the European Forums, had this to say:
This Email is a fake. There is currently no open or closed Beta for the expansion, and the links contained in the mail are probably bogus links to sites containing keyloggers.
Thank you for letting me know of this.
Issuntril Game Master / / Customer Service Forum Representative – EN
If it looks too good to be true, check it out very carefully. (Hey, miracles happen…)