Whilst waiting for the next Skyline update
I've been playing around with a really cool World generator called WorldEngine (http://world-engine.org/) that uses the following sequence of events to generate a World:The world generation algorithm goes through different phases:
plates simulation: it is the best way to get proper mountain chains. For this pyplatec is used
noise techniques are used at different steps
precipitations are calculated considering latitude and rain shadow effects
erosion is calculated
humidity in each zone is calculated
terrain permeability is calculated
biome is calculated using the Holdridge life zones model
It generates some really cool maps and because of this I have built a GUI wrapper for it (see attached pics - I had to relearn Python, but definitely worth it!).
I have had a few email conversations with the devs of the project and we're currently looking in to ways that the users can change the base World and re-run the relevant steps to reshape it (things like placing the head of a River and allowing the simulations to generate the actual River!).
Regards
Shando
the post is here someplace showing the terrain in skyline, shame it couldn't split it into chunks so you could use lod 
