For all ye photoshop newbies, heres a tut for you on the generals
Edit: I'm not sure where this belongs so i'll just post it here... Enjoy
its just the basics of cloud intergration and sharpening... nothing really big
http://img219.imageshack.us/img219/2940/rtyt8.jpg
Other than you using just a bit too much sharpening (on the terrain is where it's most noticeable) the resulting image was great and the tutorial very nice and easy to understand, great work and thanks for sharing!