They just annonuced the Cataclysm beta and my son already got a scam letter in the in game mail. Something like the "The first Warrior to .... gets a free Cataclysm beta key." SIgned the WoW dev team, and they gave a bogus web addy. He reported it, but of course they were busy.
Be careful, I know most of us understand what scams look like but some don't. Don't let your eagerness to get in the beta get in the way of common sense.