Great article. I think the list of apps reviewed still stand up as the some of the best Linux backup utilities. I'd like to suggest one more -- Kleo Bare Metal Backup for Servers
http://www.kleobackup.net.
Kleo is graphical wrapper around the excellent open source program partimage. Partimage has always been one of the best open source image backup programs around, but it suffers from a complicated user interface.
For example, if you wanted to store your partimage backup on the network, you'd first need to manually find the target, and manage mounting the remote share.
Kleo is a wizard interface that makes the job of running partimage simple without trading away any of the power. Kleo will scan the network and list possible targets. You pick your destination, and Kleo handles the job of connecting to the network share and invoking partimage with exactly the right set of command line options.
We bundled Kleo with the Carroll-Net Server Rescue Kit. A LiveCD jam packed with with 100s of specialized server recovery tools. All the best tools we like to have at hand when attempting server recovery -- Gparted, NTpasswd, Dd_rescue, install-mgr, grub, and many more.
Both Kleo & the Carroll-Net Server Recovery kit are free for any use, personal or business. The Server Recovery Kit is released as GPLv2 and Kleo is released as Freeware.
You download a copy of Kleo or read more information online at
http://www.kleobackup.netJim C.
http://www.carroll.net 
