[Resolved 10:17 AM PDT, 21 May 2014] Rolling Maintenance on the Main Second Life Server Channel is now complete.
[Update 3:06 PM PDT, 20 May 2014] Due to today’s unscheduled maintenance, the rolling maintenance on the main Second Life Server channel will continue tomorrow, Wednesday, 21 May 2014 at approximately 9:00 AM. Please stay tuned to this blog for further updates.
[Posted 7:00 AM PDT, 20 May 2014] We are currently performing rolling maintenance for regions on the main Second Life server channel. Please refrain from rezzing no copy objects, making inworld L$ transactions and remember to save all builds.
Source: http://status.secondlifegrid.net