Apparently us-east-1 was the only region that exclusively used dyndns (all other regions have failover strategies to other providers and that's why there wasn't downtime anywhere else but us-east and eu-west). They resolved the problem pretty quickly, but it drove our NOC insane...fortunately downtime for us was only about half an hour or so.
Yeah, thats about a half hour of down time for every AWS East based company... who knows how much lost revenue -- and yet they just say the service is green with a little info tag.
If our service is down for any customer (much less an entire segment of customers) we at least publish that we had a partial outage.
Unfortunately they lie through their status page pretty regularly. I am not sure what it would take for them to admit they had a major problem.