Hmm, this would help if you left the thing in your pocket when you washed your pants, but unless your camera is completely waterproof as well, this might not get you real far.
Oh, and they're also "shockproof," but I can't imagine this took a whole lot of engineering knowhow. First of all, it's a flash memory, so there's no moving parts. And secondly, SD is so small and light that it really doesn't have enough mass to break even if it falls.
But still, if you need waterproof memory for some reason, these don't cost that much more than standard memory.

Adtec will release the waterproof, shockproof SD memory card, the "AD-SDPS" series, o­n April 20th.

The AD-SDPS series is rated to be waterproof up to grades 6 and 7 JIS standards. It is designed to stand up to 15Gs worth of vibration, and can the body can stand up to 1000Gs of shock. If the card gets wet, water must be wiped from it before use.

The transfer speed is a maximum of 6MB per second, and the card weighs 2g. There are 6 types of card in the lineup: 32, 64, 128, 256, 512MB, and 1GB models. While they are all open price, the expected retail price o­n each is 2,500 yen, 4,500 yen, 7,300 yen, 11,000 yen, and 30,000 yen for the first five models...the price of the 1GB has not been finalized yet.



Inspired by:
http://k-tai.impress.co.jp/cda/article/news_toppage/18407.html

Product Information:
http://www.adtec.co.jp/parts/AD-SDPS.html