EDIT (Updated 07/08/2010) -
Updated the terrain with a GeoControl terrain.Programs(s) Used:
Terragen 2 Deep Edition, Photoshop CS4 and GeoControl for the terrain.
Terrain is much better than the previous render. I still have no idea how the terrain was such a mess on that one so I've re-rendered this one with desert terrain preset from GeoControl 2.
Minor postwork in Photoshop CS4 including the vignette effect.