Kodak is OK, but considered second string (they aim largely for the low-price market). The others you name are all excellent, tracked by price.
Olympus
depends what you want better color is Samsung if you want more to live color apple but there both good
samsung st550, but she's recently got an olympus pen
The Samsung is pretty good but I personally like the Toshiba better. I feel that the Toshiba takes better pictures and the life of a Toshiba camera is longer than the Samsung.
yes, Olympus camera lens's are very expensive to replace. you are better off just getting a newer, up to date, fancy Olympus camera. get a tripod and make some movies too.
if you are going to get the Samsung gravity or the Samsung gravity 2 get the Samsung gravity 2 the phone has better features and a better camera.
canon by far
Personally i say Olympus, some people may disagree but Olympus make great digital and SLR cameras
There are a few manufactures of camera phones that have 3 megapixels. You can either buy from Nokia, Samsung or Motorola.
Olympus SZ is a digital point and shoot camera, it is not a DSLR camera.
its samsung galaxy ace its faster and it has a better camera.
The following are some of the better Olympus accessories; camera lenses, browse accessories, xD picture cards, underwater housing, and imaging software.