s3cmd is a command line tool interfacing to S3, makes scripting your backups downright simple. <a href="http://s3tools.org/s3cmd" rel="nofollow">http://s3tools.org/s3cmd</a><p>Another is the Boto Python library (more or less a wrapper for all AWS stuff). <a href="http://code.google.com/p/boto/" rel="nofollow">http://code.google.com/p/boto/</a><p>Hopefully both of these will get version control support real soon.