Well there allready is x4 digital zoom on the k700 for those who are not aware of this but digital zoom sucks, you get the same result from croping a little part of a bigger photo.
So far the concept of holding binoculars infront of the camera is the closest thing you can come to optical zoom.
But somone should definently do one of those attachable objective lenses for optical zoom, wether it be SE or somone else