Our services in us-west-2 have been up the whole time.
I think the problem is globally accessible APIs are impacted. As others have noted, if you can use region/AZ-specific hostnames to connect, you can get though to S3.
CloudFront is faithfully serving up our existing files even from buckets in US-East.
S3 bucket creation was down in us-west-2, because it relied on us-east-1 (I expect that dependency will get fixed after this), but all S3 operations should have continued to function in us-west-2, other than cross-region replication from us-east-1.
I think the problem is globally accessible APIs are impacted. As others have noted, if you can use region/AZ-specific hostnames to connect, you can get though to S3.
CloudFront is faithfully serving up our existing files even from buckets in US-East.