I am experimenting with some different processing methods for these shots.  The problem with 'experiments' that are learning exercises is knowing when to stop.  I posted the shot below yesterday on flickr, I liked the contrast and moodiness.  And I was very pleased with what I had been able to do with the processing, especially for the first time I had attempted this.  I did have some nagging doubts that I had gone a bit too far in darkening the sky.  So today I returned to this image and worked it again, toning down some of my adjustments.  Let me know what you think.