I haven't been sharpening, no - I'm not sure that I have decent enough software to do it properly - when I try, the image just doesn't look right at all. I've been posting on trekearth.com and have received quite a bit of criticism due to my soft images. Still, I'm shooting mainly in digital now, so th images are much sharper than scanned ones.
Very nice photo. Just curious but are you sharpening your images before posting? Looks a little soft here though the image is superb. Best Wishes! - DC