I see what you are saying. I would rather do a daily sync of any changed files as the deltas would be small and then maybe have the option to do a full restore

I see what you are saying. I would rather do a daily sync of any changed files as the deltas would be small and then maybe have the option to do a full restore by getting a disk couriered to me if I'm in a hurry or fetching it online if I don't mind downloading files for a week or two. What I want to avoid is to have to bother about backups in the normal case. I just want to set it up properly as a daily cron job and mostly forget about it. Putting physical disks in the mail or safety deposit boxes is too much trouble. The server I want to backup isn't even usually physically next to me. This problem is only growing as people get better cameras and start shooting a bunch of video and stills that take up a bunch of space. An interesting solution would be a mix of this online service plus a NAS appliance to put on the home network that does fast filesharing and automatic backups locally and to the online service. When a disk in the appliance fails you call the guys and they send you a replacement drive with the data already in it.