On the Subject of Backup Software

For this reason, I'm looking for backup software that can split a volume across multiple DVDs during backup. I do my actual backup with psync, but that only backs up to another volume - in my case a FireWire drive. Occasionally, I would like to burn disk images that I can store away and that are not as susceptible to defects. Any suggestions? By the way, Apple Backup would meet these requirements. Unfortunately, Apple forces you to have a .Mac account in order to start the backup program. So you can only use and restore your backups if you still have a .Mac account. I don't really think that's fair - data backup should be something that isn't tied to a 99 euro per year internet provider...