Heroku has open-sourced the product they use to upload WAL files to S3.  Can confirm (not with S3, but with Swift) that it works fantastically:<p><a href="https:&#x2F;&#x2F;github.com&#x2F;wal-e&#x2F;wal-e" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;wal-e&#x2F;wal-e</a>