This issue is resolved.

Prior details:

Smartsheet is currently experiencing an issue which prevents users from logging in.  More at:

http://status.smartsheet.com/

Unscheduled outage resulting from power-related problem on Feb 27, 2015 beginning at 3:48 PM.  As of 4:50 PM most services are now operational.  More at status.lbl.gov

To support testing of recently repaired emergency power off (EPO) equipment, a full network outage is scheduled on December 26 from 8:00AM-3:30PM.  We expect some services to be restored before 3:30PM.   All Laboratory network connectivity, most IT services, and some telephone services will be unavailable. ...