Like Silvercreek, I have a Pentax Optio series, but can't remember which one. Its been a good camera as far as point and shoot goes. Adjustable ISO, and the macro feature silvercreek spoke of works nicely. The only downside for me is that using the manual focus feature is kind of hard with one hand.
I've beat it up, dropped it on rocks, sent it tumbling downstream, and it still keeps taking good (enough) pictures. I think I've had it about 3 years and the battery still holds a good charge.