Mi sono imbattuto oggi in questo script:
MyBackup:Enhance the power of phpMyAdmin's export feature, and backup your database(s) and web files automatically using scheduled cronjobs. This script is great if you need to regularly backup your database and/or website files to a remote location, too, since you can FTP your backups to another server, or email them.
Non l'ho ancora provato, ma promette bene
ecco il link:
http://www.tufat.com/script96.htmah, è free