Looks like it's a big news day today! The Cataclysm alpha/beta character copy page is now live on the World of Warcraft website. This is for the alpha currently going on and the beta which should be starting soon.
Quote from: Zarhym (Source)
Yes, we can confirm that the Family & Friends phase of the testing process for World of Warcraft: Cataclysm has begun. The closed beta test phase has not yet started, but we will provide updated information when it does.
As a reminder, the opt-in has not been announced yet, so consider any
emails you receive a scam until it has been. The only people who have
likely been contacted are members of the press, fansites and any friends
& family testers on the Blizzard Friends List.
Stay tuned for further updates as we get more information.