Pentax has announced the Optio W20 waterproof digital camera, an update to the older W10.  The W20 meets the JIS Class 8 waterproof standard and Class 5 dustproof standard, enabling it to be submerged in water for 30 minutes at depths up to 1.5 meters.  New features include a 7-megapixel sensor, Blur Reduction Mode, 2.5” LCD, Face Recognition AF, SDHC memory card support, and 21.9 MB of built-in memory.