I've seen a couple of articles this morning about the map of Middle-Earth that J.R.R. Tolkien annotated, including this one over at IO9. It's definitely neat, but I really hope that someday soon there will be a large-scale print version (preferably with notes) made available to those of us who can't go to see the original.
The largest size image I've found so far online is this one. It's good, but I can't read any of the annotations in the image. Part of that, I will admit is because the writing is a challenge in itself. However, many of the notations are quite faint and small - even when zoomed in on the image.
The Tolkien Society article on the topic.
The Bodleian Library article on their acquisition of the map.