Dirvish is a fast, disk based, rotating network backup system.With dirvish you can maintain a set of complete images of your filesystems with unattended creation and expiration. A dirvish backup vault is like a time machine for your data.
UPDATE:
The main Dirvish site is down, but this guy has the 1.2 tarball, and a copy of the site:
Keith Lofstrom: Linux Backup-to-Disk Page