Most Walkman phones from W810i and newer have flash themes, which cybershot don't, but also worser camera with only 2.5 zoom and 2 meg.
That's not true. K850i and K770i support flash menu's allso. W800i, W810i and some others have 4x zoom and W890i, W960i, W760i have 3.2 megapixel camera's;)