Digital BW, The Print

There's been a lot of good advice in this discussion. No one way is 
cost/risk free.  At the moment, I store my scans on a mirrored RAID 
array, and I burn DVDs of edited files.  Thus, I have film, hard drive 
and DVD image storage.  Of course if my house burns down, nothing will 
help, and I'm not willing to go to the hassle of storing stuff off-site.

For those storing only on hard drives, here's sobering story. Last week 
lightning hit the house of one of my customers.  It started five fires 
at various points in her house. Her her new plasma TV lit on fire, as 
did the expensive Monster power conditioner it was plugged into, and 
lost her whole computer system. Luckily she was home to put out the 
fires, or she'd have lost her whole house.