I’ve just discovered PsyncX, a free and open source back up tool you can download here. I’m using it to create a synchronized backup of my files to an encrypted volume on a separate disk, and it works rather well (albeit with the occasional crach). Options are sparse, but it just right for my needs. It’s basically a graphic interface for psync, so those of you with cron jobs and command lines coming out of your ears might not need it.