UPDATE: 4:00pm ET:
FINAL UPDATE: 4:40pm ET:The server is back online, and should be functioning properly. Please contact me if you are noticing any further connection issues.
The official response from the server techs was this: "...it seems there was an issue with the IP address associated with your account and routing. Our system administration team routed the IP correctly and this issue isn't happening anymore, we apologize for any inconvenience this issue may have caused."
Sadly, this was caused by their reconfiguration of *another* issue they were attempting to correct.
My apologies for the down time.