In an attempt to be as open about it as possible, I will tell you that JGO was compromised 2010/12/31 at 02:30 AM.
A successful attack on SMF has been made through a moderator account, of which the attacker knew the password. That moderator has been notified. Stupid as SMF is, it allows the Moderator account to change the password of an Admin, giving the hacker full access to SMF by logging in as that admin. Apparently this is a well known attack vector, as the attacker was an admin in roughly 5 seconds.
This was a very specific attack where the hacker tried to find out as much about this person as possible. Several seemingly innocent changes (yet obviously harmful as there is no other reason for these changes) to JGO have been made, which are getting restored right now.
Among other things, I am also doing a rollback to just before the infection. About two hours of messages are lost as a result of this rollback. No attempt will be made to retrieve these messages.
For the moment all moderators have lost their permissions, to prevent this from happening again.
Although the http-log (and the sum of tcp-traffic during the attack) strongly indicates there were no database dumps made, please consider your (salted hash) password and your emailaddress compromised.
Sorry guys.