There's a new email going around that pretends to be from Blizzard, and says they are going to freeze or cancel or close or whatever your World of Warcraft account if you don't login to their website - which they have a falsified link to that goes to spamistan.
Anyone clicking on the link is likely to be infested, plus anyone that actually logs into their site has just given their WoW login info to thieves. With that login, they can login to your REAL account and get your personal info, perhaps even billing info like CC#, etc.
So the lesson is - never click on links in email. If you know the correct site, type it in, otherwise use a bookmark you already have and know to be true.