If they sent you an email every time there was downtime, then you would know every time there was downtime. Any time your servers are not available but you don't notice == win.

> Any time your servers are not available but you don't notice

Can't happen. My servers are monitored by external services that (to the best of my knowledge) don't use AWS.

It's best to play the open card in any case.

Emails will be sent out when the problem is more fully handled, as usual. HN is a decent place to get some info, but you should consider posting to the AWS developer forum as well, b/c there are Amazon people constantly checking on things and answering questions:

https://forums.aws.amazon.com/forum.jspa?forumID=30

Edit: I should add, they can look up your specific instances to get the exact problem.