news about stuff that maters: http://www.tomatonews.com/
I have a pair of external FW800 drives in a software RAID-1 configuration. Every month I bring one of them home from the office, remirror, break the mirror again and take it back to the office.
If I have a total system loss (fire, theft, etc.) I'm worst case 1 month out of date.
My very critical data that I can't tolerate a 1 month loss of, I use online backup (http://www.tarsnap.com)
Of course you can't flap your arms and fly to the moon. After a while you'd run out of air to push against.