For the parent already juggling strollers, diaper bags and a million other things, lugging around still and video cameras can feel like the straw that breaks the camel’s back. Even most of today’s compact cameras take up too much room in the purse and diaper bag. Enter the new “ultra-compactâ€? cameras. The Casio Exilim-S880 is just such a sleek ultra-compact design that has been dubbed a “credit card cameraâ€?. It fits easily into a pocket, purse, or diaper bag.