I think a Dynamic Minecraft Map would be a great addition to the website, and the server as a whole.  Imagine being able to observe the entire server map from the site in real time!

Why does it have to be dynamic? (I'm assuming be dynamic you mean it is continuously updating). The map in your car or an atlas is useful. Some of Google maps photos are years old (in the demo versions) and yet the mountains, hills rivers and lakes are still accurate. Why not have some sort of map that updates daily or weekly? The daily/weekly updates would let you see what has been built, but wouldn't create lag issues. We could download the file and then zoom in and out and examine everything as much as we want.