All I was doing was trying to log into SL.
So I went off to check the SL grid status. Apparently, the announcement went up a bit before one AM:
[Posted 12:51 AM PST, 09 January 2016]Okay! So, the unplanned maintenance was really unplanned. Wonder what went wrong?
We are performing unscheduled maintenance. While the maintenance is in progress, some residents may experience login issues and residents in-world may be logged off or experience degraded performance. Please check back here for updates.