I've been using a Pentax Optio W20 for about two years now and I'm very happy with it. I've taken shots and movies underwater and it works pretty well. I fish high lakes a lot so I really need a waterproof/resistant camera (in addition to living in Washington's Cascade wet country).

I've been wanting to get into photography the last year or so, so I purchased a Canon S3 IS. It's a great camera, but I find that I revert to my little Pentax more often while hiking. I weighed it on my scale and it tops out at 5.4 oz.

Cliff