Paranoid about your home backup?

I’ve installed Windows Home Server at the house and have been enjoying the peace of mind of nightly full machine backups.  As I’m learning more about home server I came across this article from the WHS Hacks site on the ioSafe external hard drive.  It’s a USB external hard drive that can be underwater for 3 days or can withstand a fire up to 1500 degrees.  Wow.  That’s just insane.