"I just encrypt my data, upload it to P2P networks as "Jessica Simpson Home Porn Video", and let horny geeks mirror my backups for eternity."
Whoa. Wait a minute. How does that work? They're thinking they're getting porn, but it's really your run-of-the-mill file storage? That's a great idea.
All kidding aside, I backup online using remote RAID systems networked via VPN and offline using DVDs.
Until you need to do a restore and wind up downloading a new virus.