The Cyan and MystOnline forums need to moved again so they will be unavailable starting tomorrow (Dec 5th) at around noon PDT and will last several hours. Then once the servers are back up then it may be another 24 hours before the DNS records (the thing that tells your browser where the servers are) to catchup to the new server address.
We are very sorry for any inconvenience this causes anyone and will be working hard to get things back up as quickly as possible.
Added: The forums move is done. All back online. Thanks!