According to several sources, including this article at eWeek, security firm HBGary Federal is paying the price for taunting the hacktivist group Anonymous. A few days ago, HBGary claimed to have uncovered information about the leadership structure and identities of Anonymous. In retaliation, the group compromised the HBGary network, posted internal emails, and generally caused havoc.
(Update: Apparently, the root of the compromise was a social engineering attack. Someone was convinced that they were sending authentication credentials to a host behind the firewall to a legitimate user; apparently, they were incorrect. The idea that a “security” firm would be sending unencrypted email with account details in response to an unvalidated, unsigned message boggles my mind.)