Comment on SmartBackup

I use SB to automate all backups. Daily archive of documents and weekly full disk backup in headless mode. iCal automatically reminds me to plug in the external drive. If I want full backup. I enter the admin password, if not I hit cancel in the authentication dialogue, the rest happens automatically. After the backup, SB disappears.
This is foolproof :-), and yes I paid up the $10. It is worth it IMO. Try for yourself.