Yes it is day 100 of this blogging and journey – my how time flies
I forgot to look at this landscape generator earlier, so what does Terragen (http://www.planetside.co.uk/terragen/)have to offer. It seems to specialise in the rendering and procedural/heightfield generation side of things. It uses vegetation models from say xfrog and I am not sure how well it would accomodate a ‘design proposal’ type usage.
That said – check out these images from their website gallery – super: