Nice, I was happy with Mondorescue for this as well
I went through Mondorescue and Bacula yesterday afternoon and evening. Mondo's limitation is that it only supports the *nix stuff well. You have to mount your Windows partitions to capture them as blob files which means a dualboot system at minimum. You also have to stop your database servers and similar daemons to avoid data file curruption. As a *nix only system imager, it is easy to install and use though. It writes to various destinations though sftp/ssh is not supported. The ISO boots and lets you compare the image, restore in part or restore in full.
Bacula is a monster to setup but supports multiple OS. I still have to get a client workstation setup and run through the backup process then try a restore. It seems better for doing a full system image followed by incremental backups.
G4L is not in the Debian Lenny repositories but neither was Mondo so it may simply be a matter of getting the .debs or a liveCD. I think I was looking between it and Clonezilla in the past before other projects got in the way. I'll have to look at G4L today and give it a proper run. It means shutting down the system to take an image but may trump Mondo for doing recovery disks that anyone can through at one of our servers instead of my build scripts that take a little knowledge followed by the dev's restoring there layers that run on top of mine.