Just about got it done, (hangover thankfully just about gone). Despite hosting the final render myself, I can't seem to get it to appear so I've settled for just posting it as an attachment
Enjoyed doing this, though I doubt I'll follow it up a dirty version. I had hoped to render it with a fish eye lens effect, but the first method I found (create a reflective hemisphere and point the camera at that - away from the scene), seemed like it'd require a lot more twiddling time that I had available
Mkm73