When the server crashes (not common I'll agree, but it does happen), there should be a server status (maybe on the support home) to give us status updates?
We have staff on hand to do nothing but pick and pack orders. When the server is down, and after 1/2 hour we don't know if it is just a few more minutes or a few more hours, we need to know whether to send staff home or not.
Just a 'Down for maintenance' screen with no updated information is not enough when we are counting on you.