I'm glad you tried the file. Surface details are nice but I must admit I kind of agree with Rich.
I saw a movie a few days ago called Koyaanisqatsi. It has an awesome view of Monument Valley. Kind of from this perspective:
http://www.photographersgallery.com/photo.asp?id=229The stepped terrain is how you'd get something like this. It could do with more ability to change the step profiles but with a lot of work I think you could get something similar to that photo. More terrain blending for lower areas and shift things about a bit in other ways.
Just another point about that file. You can have as many or few steps as you want. Just take out all the blue nodes associated with a step (best if you don't need them) or add in more but the values at the top for where each step begins are relevant. I didn't talk much about that but those are how you make the step starts move around horizontally. They are the value range of the fractal's output used to create each step. Some of you may know this anyway.