EC2 TO S3 BACKUP
BACKUP
ec2-bundle-vol -d /mnt -k /root/PrivateKey.pem --cert /root/Certificate.pem -u 012345678901
UPLOAD ec2-upload-bundle -b yourbucketname00404042009 -m /mnt/image.manifest.xml -a your_s3_access_key -s your_s3_secret_access_key
UPLOAD RETRY
ec2-upload-bundle -b yourbucketname00404042009 -m /mnt/image.manifest.xml -a your_s3_access_key -s your_s3_secret_access_key --retry
RESTORE
ec2-register
OR Run your instance from EBS type OS (with snapshots even!)