When I saw John Shaw about 5 years ago, he was talking about the Orton Effect. The Orton effect is where you sandwich two frames together, one in focus and another out of focus. Some of the Nikon cameras will let you do this in camera. Some of the newer Nikon cameras offer an auto gain function to make this easier. One of the things that is challenging is getting just the right amount of blur.
But you can also do this using photoshop using layers.