I would like to know if anyone has had experiences with pocket-sized digital cameras that are waterproof (so if I take a tumble in the stream it won't die on me). I guess they're called "point-and-shoot" (P&S) cameras. I'm looking for a well built one, with a very good lens, that can be equally used to take good pictures of landscapes or, up close, of a fly.

I'm not the kind of person who can spend $500 for a point-and-shoot, but neither do I want a poor quality camera, as I am the kind of person who will keep it as long as it works, for many years.

A couple of years ago someone recommended a Pentax Optio, but things seem to change quickly in electronics, so I thought I'd ask for your advice. Thank you.