Look at it as another D300 experiment and not yet another Christmas Cactus.
I'm fond of images made by the Orton technique - two overlaid images where one is in sharp focus (typically shot at like f/22) and the 2nd is shot wide open and out of focus. The out of focus image creates a misty halo around the sharp version. This technique was originally done by the "inventor" (M. Orton) with slides where the first was shot at +2EV and the 2nd at +1. The slides were removed from their individual mounts and combined into a slide "sandwich". With my D70 I did this by shooting two separate images and creating a composite overlay in software.
Ever eager to get more images "right" in-camera and spend more time shooting and less time editing, I decided to try to do this in the D300 by means of a simple two shot multiple exposure where the two shots are made in a corresponding fashion to the two slides - one sharp and one out of focus. I experimented a bit with how to handle the exposure (using the D300 multiple exposure "gain control" and the usual exposure compensation). Within reason my settings didn't make too much difference. Subjective as usual. The overall results definitely looks like I'd expect my Orton image to look. Success.