Potential Data Protection Strategy? - OpenFiler

As I wrote before, I'm trying to figure out a good strategy for getting my personal data in my home network protected in a more safe and robust manner. Still in research mode, although I'm not sure that "backing up", per se, is going to be feasable. I am leaning towards setting up a fileserver with a RAID configuration. I've been browsing the OpenFiler.org web site and am intrigued.