How did I do it....
I under exposed by 1 stop, then just adjusted the contrast slightly.
Not sure what desaturation is and I didn't add any blue.
The "black sky" is actual the mountains in shadow in the background, hence with the under exposure they have gone all together.
tryfan06 - 01/Sep/08
wow, so this is pretty much as it came out of the camera?
Desaturation is removing all saturation from an image, ie turning it to black + white