Like a lot of people, I'm not so into photography that I feel compelled to lug a 50oz DSLR into the backcountry. I think a lot of people are in the same boat as me. We want to buy a camera that takes good pictures to remember the trip by, without lugging along a lot of extra weight. Accordingly, I think sub 5oz (or maybe 6oz) point and shoot cameras are a valuable type to evaluate.
What I want is a camera that takes good photos that I can use for posting on Facebook, looking at on my computer, printing off a few 4×7" prints and maybe the odd medium sized print. I'm happy with the quality of photo that a decent point and shoot provides.
So for type of camera, my considerations are:
1) Photo quality
2) Light weight (sub 5oz)
3) Battery Life
4) Durability
5) Video? HD?
6) Optical Zoom (for wildlife shots)
My current camera is Canon SD780 IS. This camera takes 12MP pictures and shoots HD video while weighing just 4.06 oz (4.3oz with battery and card). It uses a rechargable lithium pack which I like because it's lighter and more compact. I can go an entire week one one battery….and I could always carry a second battery pack for longer trips or if I wanted to snap pictures constsantly. One thing I would like is more optical zoom. 3x is the bare minium. I used to have a camera with 12x optical zoom and that enabled some really neat pics.
I wanted to buy a waterproof/shockproof camera like the Olympus Stylus ones, but at 2x the price it didn't make sense. Plus those are 2oz heavier. I think the ultralight way is to carry a lighter camera and take care of it by being careful and/or using a light case (ie. bubble wrap) rather than buying a heavier camera clad in thick metal so you can abuse it.

