Update (5/6/12): I have not been actively developing this script lately. Zertrin has stepped up to take over the reins and offers a up-to-date and modified version with even more capabilities. Check it out over at github.
This bash script was designed to automate and simplify the remote backup process of duplicity on Amazon S3. After your script is configured, you can easily backup, restore, verify and clean (either via cron or manually) your data without having to remember lots of different command options and passphrases.
Most importantly, you can easily backup the script and your gpg key in a convenient passphrase-encrypted file. This comes in in handy if/when your machine ever does go belly up. Code is hosted at github.