It is a brand new unscratched World Wide Invitation card from Blizzcon 2008.
Key in the code, which appears on the *First Line* after you scratched off and reveal the code,
in the code redemption page and you will have a temporary code.
To redeem, once you have obtained the in-game temporary code, you either visit Edward Cairne (Undercity) or Ian Drake (Stormwind).
I have two of these cards left
add my Skype pls: tocylia