Backup Philosophy: DVD's & HDD's?

[softball]

I use terabyte hard drives for both raw tapes and edited masters. They live in bank vaults. I keep both versions on terabyte hard drives in house for daily use. My originals are all on tape and cut versions and flash and wmv files are both on my hard drives and servers. So if the entire North American continent sinks into the Pacific Ocean, I am fucked. Otherwise I am quite confident that any act of God, terrorism, or cataclysm would only be a slight interruption.