I just released an early demo version that showcases parts of what I've managed (and obviously what I haven't!).
If you want to have a look, and try it, you can download it at: https://sites.google.com/site/genworlds/
It only works on 64-bit windows for now, unfortunately.
Some have reported an error after map generation is finished, but in those cases the maps are still produced and located in C:\Temp\