I found a program that lets me make maps of the areas discovered in Minecraft. It's a pretty slick little program and can do everything from general surface mapping to cave mapping based on the save file. The program is called Cartograph by someone named ZomBuster.
Check out this map of one of my saves below, you will have to zoom in to the pixel level in an image viewer to make out some really small details. Larger things like buildings and stuff shouldn't require as much zoom.
See if you can make out my settlement in the map. Should look like a goofy pipe with the tail going to a snowy peak near by. That tail is a dual mine cart track which allows me to ride a mine cart roller coaster of sorts over mobs safely as well as carry extra ore back in carts with trunks.