I am using the new Nikon P60. It uses AA size batteries. I put a couple of Energizer Lithium AAs in there weeks ago and it is still going strong. Very useful. I believe that the Canon XS1000 uses AAs and there may be one or two others. Most people shy away from AA format because they think of using alkaline batteries since those drain quickly. But going lithium negates that. As you indicate, when traveling I don't want to have to recharge and I want to be able to buy more batteries in a pinch at any drugstore on the corner! Of course, even with AA format, you can get rechargeable batteries, too, and have the best of both worlds.
Will be on month long trek without access to electricity. If I want to go digital - is there a small light weight high end camera (Canon, Leica, Nikon) out there the uses alkaline batteries........?