I will be making world painter worlds for u guys soon, each world may take up to a few days to finish and will be up for download a while after finishing, I will make a private post with you on forums if you get one to show a preview. Please don't spam me with requests, I can only handle 2-3 worlds a week and I also have a life. Always post here after submitting a form so others can manage and not clog up my time. I do my world previews in 1.8 cuz i play on 1.8 servers a lot now but the worlds save in the same format (Anvil) from 1.2 all the way to the latest version, so unless Mojang makes some changes to the world code, the worlds should not corrupt unless you go into older versions with it.
This morning's work (It's a bit rushed):