In an article in the BBC Technology section (Digital memories survive extremes), BBC describes how the Digital Camera Shopper Magazine put some commonly avialable memory cards through some very rough tests and they came through.
The test included 5 memory card formats being boiled, trampled, washed, kept in coffee and cola, played with by a 6 year old (now THATS rough !). Surprisingly, they say, all the cards they tested survided the tests.
Its nice to know that my memories are in safe hands (err.. cards) ;)