> - S3: watch out for "eventual consistency" if you're going to upload lots of files and try to access them right away - they might not be available immediately.

This is only true in the "US Standard" region. Other regions get read-after-write consistency (but not read-after-update, read-after-delete, etc). "US Standard" is the only bi-coastal S3 region, so I guess that consistency level would be too expensive, latency-wise.