I am a huge Minecraft nerd, so much so that I have my own private server. Here is a map of the current world. It displays all active players in realtime, and provides 3D maps of the Overworld, underground cave structures, Nether, and The End. Below is a gallery with some pics of the world. I am constantly adding new ones.
If anyone wants to come play around, email me and I will put you on the whitelist.