We have corrected an issue with one of the web servers that was responding Server Unavailable for some users since 5:00PM EST. The server is now back up and running without issue at this time. We are looking into the cause of the problem and will update here when we have more information.
Thanks for your patience,
Update: The server will go offline for approximately 5 minutes in the next hour for a reboot after some configuration changes. We apologize again for the downtime, but it should help us fix any remaining issues.