The other feature that should be worth touting is that you don't need to install anything special on the source repository. I think it has potential. The prob

The other feature that should be worth touting is that you don't need to install anything special on the source repository. I think it has potential. The problem space is complex enough that many different solutions can exist. For example, at my current job we ended up creating our own backup system that would let us easily sneakernet old copies of the data to our offsite location. For what it's worth, some other open source backup tools that are similar are rdiff-backup and obnam. I've been meaning to make a page like http://en.wikipedia.org/wiki/Comparison_of_online_backup_services http://en.wikipedia.org/wiki/Comparison_of_online_backup_ser... but for open source solutions.