Various experaments with that Wind Erosion look using the Ultra Erosion Macro that comes in handy for this.
http://www.ashundar.com/datas/users/1941-wind%20erosion%20test.jpg
Another test adding some noise to the glacier that was inspired by JavaJones idea to add voronoi to the glacier in an older thread.
http://www.ashundar.com/datas/users/1941-g&v.jpg
http://www.ashundar.com/datas/users/1941-wind%20erosion%20&%20glacier%20tests.zip
the results in both pics look sweet, downloaded your zip file to take a look. SeerBlue
I figured i would go back to tackle the wind erosion ideas that were discussed here a while ago but i could never have figured that the Ultra Erosion macro would get me closer to that look. I have to thank who ever put that macro together. He should make more macros. This one has potental to evolve into a more feature rich macro. I think if i can find a way to widen and flatten the channles it may be a even more closer approach to that wind blasted terrain.
The glacial noise was more a less a quick mess around test. Nothing to serious. I’d still like to find a way to see it melt away as a river flowing down the valley. 
Has there been any success with the rivers for world machine?
Oho! Very nice results. I see you were able to get smaller breakup than I. I think this combined with some larger breakup and more variation would be really nice.
I think i can arrange that.