Berkeley Data Systems today announced the release of Mac Mozy public beta, its unlimited online backup service for Mac users worldwide. At US$4.95 a month, the service allows Mac users to encrypt and automatically backup all of their digital media content online, including collections from iTunes and iPhoto. Mac Mozy offers an added measure of privacy by allowing its users to choose between a Mozy encryption key and a private encryption key. Incremental backups and block level differentials are included, which means subsequent backups complete at a much faster rate than the initial backup. Mozy’s servers also retain the most recent version of a file as well as 30 days worth of previously modified file versions. Customers may retrieve files or versions of the files via the Internet or by requesting a DVD restore with next-day delivery.