As you probably saw, we were compromised briefly today. Thankfully nothing was severely damaged, just the templates which we have since fixed. Unfortunately, it does look like part of the user database may have been compromised. We do not know to what extent, but it would be best for you to change your password for forums and possibly your e-mail account, if they shared a password.
I apologise for the inconvenience, and we're putting in even more protection so this doesn't happen again.