UPDATE: As of 5/6/2016 03:40 PDT, any data available during this issue has been restored.
UPDATE: As of 5/6/2016 03:14 PDT, the issue has been resolved. Data will be uploaded over the course of the next few hours.
2015-05-06 15:01 PDT: Our operations team has identified the problem as a communications failure to a single database server. Our team is working on restoring connectivity.
2015-05-06 14:58 PDT: Reports of problems accessing some data at the moment. Our operations team is investigating; more to follow shortly.