When you're shooting in RAW-only mode (not RAW+JPG), most (all?) cameras also generate a JPEG preview using the current style settings. This is what you see momentarily when you first import the image into Lightroom, and also what you see on the camera's LCD. (Try switching the picture style to B&W and you'll see this very clearly: B&W on the camera's LCD and briefly in Lightroom before it's overwritten with a colour image.)
My question is, is there any way to save that preview from the camera as a separate JPEG file?
(I know that shooting RAW+JPG in the first place is the best way to achieve this, but I was thinking particularly of the problem posed in this question.)