I've been looking for a way to use S3 to backup my Linksys NSLU2, and it seems like s3sync will be the most workable solution.  I have it working, but encountered one problem with using s3sync for backups: it doesn't preserve the modification time when files are restored.  So if I need to restore from the S3 backup, I lose all the modification times on my files, which are quite important to me.

This seems slightly strange, given that other metadata (owner, permissions) are preserved.  So have I missed something?  Is it hard to add?  Should I add it to the feature requests?

One other thing: I found the SSL_CERT_FILE trick from the README didn't work for me, perhaps because I'm using EU buckets and it needs a different cert.  I could use s3cmd, but tying to do an s3sync failed.  So I grabbed the certs from another Linux box, basically the contents of /etc/ssl/certs and /usr/share/ca-certificates, pointed SSL_CERT_DIR at /etc/ssl/certs, and this worked fine.