Quote from Fendron
Ok, I am making a flat map. I will give a download link when I'm done. 150 Chunks in every direction. Flat with grass, and the height is 32. So you can dig 32 down until you are at the bottom of the world and you can build 86 blocks up.
Edit: Ok here is the download link: http://www.2shared.com/file/t-pcYWAm/CreativeFlatWorld.html