The original render was a simple Blender set-up consisting of only the object, a background plane, and the camera, all rendered out with Cycles. The object was primarily lit by an HDR image (used to produce a more natural global light than just ambient occlusion alone), with a single Blender light placed just left of camera to fill in some dark areas. I no longer have the HDR, which is why the .blend file included in the download has such a skewed color when rendered today. The focal blur was also done in Blender with the virtual camera.
Post processing was done in Photoshop and consisted of a RGB shift, the purples on the side of the image, and the slight shading on the edges to make a very subtle vignette. The RGB shift was simply a stylistic choice, where as the other effects where used to clean up and add to the image, giving the illusion of a more sophisticated lighting setup.