Just did a cursory glance at the article, the thing I got out of it was ssh and rsync, maybe some tar thrown in there too. That's how I currently do my backup. I was doing it to two other boxes, one local and one off-site. I backup my home directory, minus a couple of directories that have MP3s in it and media files like movies and tv shows. I don't back up my /tmp dir. I backup all my stats gathering programs and their data, vnstat, mrtg, awstats, as well as my dns/bind, apache, and sql directories, plus a few others.
All in all it's over a gig or so worth of data that I've backed up. The initial backup took a while to do, especially the offsite stuff. But my nightly backups now take around a minute to do, and that's mostly due to rsync checking sums to see if anything needs to be uploaded.
From a perspective of someone who has been doing administration for 12+ years, I don't find anything wrong with doing it this way, especially since I don't have access to a tape drive.
Before attempting this ... well, ok, after I already started, I found several other articles about how to do this and in an even more efficient manner, such as using hard links and soft links and some other junk to actually have a history of backups. It was all rather neat, but all I really need is just a backup, and that's what I have and it works.
Nothing wrong with using rsync to create an off-site or on-site/off-box backup.