NY Times: After Web site WikiLeaks published sensitive government documents, several companies, including PayPal, Amazon, and MasterCard cut their ties with the controversial site. Now, a group of "Anonymous" hackers are attacking these companies' sites, as well as those belonging to other "enemies" of WikiLeaks.
Some analysts and some of the "hacktivists" behind the attack are calling this a cyberwar. One post at a forum used by the group behind the attacks reads, "The war is on. And everyone ought to spend some time thinking about it, discussing it with others, preparing yourselves so you know how to act if something compels you to make a decision. Be very careful not to err on the side of inaction."