I have seen no reviews on the Pentax WP.
You can find a list of such cameras that have been reviewed by going to:
http://www.steves-digicams.com/hardware_reviews.html
Button - lower right corner.
...
..
.
Does anyone have this camera? Has anyone found a review of it? Does anyone have experience with "waterproof" cameras?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic