This is currently up on their Twitter account. From the looks of some of the screenshots on the Twitter Account, they may have compromised a staff member's account on MyBB.com. Edit: They probably don't have links to the ACP enabled, so it could be an admin account. Update: It's been confirmed that a moderator's account was compromised, and that the IP Addresses of all the staff was dumped on Pastebin (not sure what they're trying to accomplish with this). Along with the obvious being that the culprit compromised the Twitter Account.