Yes, it has been offline for me most of the day. 

Hi SGraybill1, 

Thank you for reporting this! The site isn't loading for myself either and I've let the Sage X3 team know. Will update here as soon as there's any news.

Warm Regards, 
Erzsi

Function Help isn't working within X3 either.

The Sage X3 team confirms that it is loading slowly, please try copying the link into a Chrome Browser. 

Hello all, a major outage is now reported for Sage X3 Online Help. 
Updates will be posted here  status.sage.com as well as on the announcement forum here.

Working like a charm, now.