The Analytics dashboard will be briefly unavailable on Wednesday May 2nd due to some required maintenance. The maintenance should start around 4PM PT.
The Analytics dashboard will be unavailable for that time. The Validator within the Editor, the metrics displayed on the Developer Dashboard and the Raw Data Export API will also be unavailable.
There should be no data lost from this maintenance.
During this time, if you try to integrate Analytics from within the Editor, you may not receive confirmation that integration was successful. However, after the maintenance is complete things should work as expected.
I will update this thread if there are any new information.
Edit: This maintenance was postponed.