I strongly advise you to watch some of Jamziboys Worldpainter and terraforming tutorials. no offense, but there will be very few people interested in this terrain. I can see you have an intereest in it though, so if you sacrifice a few hours of your time to watching tutorials and practising the techniques there, I'm sure you'll make a fine terraformer, and even one who can sell custom terrain (believe me, only the very best terraformers manage to make any respectable sales).
Making free terrain for people is a great way to start of course.

Since no one else has requested anything, I'll request some terrain, on the condition that you use newly learned techniques for it.

I would like you to make me a map, roughly 100 by 100 blocks in size and as high as you like. it should be a valley that is like a spiral in shape, with increasingly tall mountanis, and which has a cave in the center.

Take however long you need. If its done, Pm me with a link. I might have forgotten, so put in a link to this topic as well.

good luck!

Links are working, but you should do the name in the URL like so:
[url=http://www.planetminecraft.com/project/extreme-mountains---custom-terrain/]Extreme Mountains[/url]

All links aren't working.