McDonalds hacked, customer database stolen, your burger preference now in the wild
While McDonalds is probably the biggest name on the list, it seems the creative users of deviantART are also affected -- and a brief look at Silverpop's site suggests it might have upset some other very big names, such as Mazda and the banking giant Santander.
There's no information about how the hack was achieved, but the FBI has said that the attack originated from outside the US. In all likelihood, the attack was probably carried out by spammers, or the operatives of spammers. An email address database the size of Silverpop's would sell for millions.