Wow, this is gorgeous!! There's just enough touching-up so it captures the colors like our human eyes would, without looking unrealistically saturated. I'm guessing the split point between your photo and the stock is the sky, yes? I'd be interested to see the originals.
Also, would you happen to have an HD/widescreen version of this that you would be willing to release? I'd love love love to use it as a wallpaper on my big HD monitor!