Buckets creation/deletion is a global operation, namespaces are all global for it. When us-east-1 goes down, so does bucket creation. All other operations proceed merrily, but yeah as we see over and over again, whenever us-east-1 has an outage everything seems to shit the bed because they've built everything out in us-east-1. Hopefully us-east-2 is starting to eat in to that.