if the goal is to keep size down (why defeat a small pocketable camera with a bulgy, if that's a word, case?) and prevent scratches, which is what i wanted, I bought one of these soft cloth pouches used for sunglasses. it is like those oakley soft pouches, except mine was like 4 bucks at Champs sporting goods. it adds a minimal amount of size to the camera and i can still throw it in my pocket with no worries.
i do have a regular case, though, for when i throw the cam in luggage or something. It's the psc-90 (
http://www.amazon.com/gp/product/B00065...69?%5Fencoding=UTF8&v=glance&n=502394) and my SD410 fits snugly into it. i wouldn't put it in my pocket.