I saw a while back that Sentry makes a waterproof and fire protected HDD.
Sentry hard disk products

I don't know anything about these other than seeing them referenced in an article a while back. Just wanted to point the group to another possible tool.

I had not seen the iosafe before. The price on iosafe seems much better (500GB for about $150 currently) where sentry seems very pricey (250GB for $400 MSRP).