Ill go with
Terragen.org for all my uploads that won't fit here. I was leaning to that anyway, but I wanted to make sure what sites people prefer.
I feel inclined to remind that your not going to be able to just drop the files in a scene and get the look I got in in the links. There was a good bit of playing in TG to get the textures to play so well. And in the end I had to render twice; Once RTO on and Once RTO off, then painted them together in PS using masks.
You'll need to do this too if you want to keep your green (walli plants) looking their best, and still get the displacement level that you see in my first link.
The models are pretty thick (dense) in the first place. But the really fine displacement is coming from maps on top.... See Oshyan's take in the Mudbox maps thread.
Lastly, please remember that they were my first ever endeavor into modeling, and I really just bulldozed my way through it. So if you get them and you don't like them, you can alter them your self. (Im much better now though!

)
Ill register with
terragen.org and post this weekend.
Ill post them with the same Copy notice Walli uses on his free stuff. I think the only restriction for that is you cant sell the objects or repost them? Pretty good way to go I think. Let me know if theres a reason not to do it that way.