The original render, as seen below, was a simple Blender set-up consisting of only one light, the object, the background, and the camera, rendered with Cycles. IIRC the object was mostly lit by an HDR image (used to produce a more natural, global light than just ambient occlusion alone). 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 naturally 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 making 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.