I've been upgrading a number of things on the server (firewall, kernel, php, etc.) today, and it will continue tonight and tomorrow.
This requires a reboot every once in a while, and some of the items being installed could lead to temporary errors while the settings are being tweaked.
I don't anticipate any extended downtime, and there may be none. If there is any downtime lasting more than a few minutes, I will post updates on http://status.broncosforums.com which resides on the backup server.