I'm amazed that a post about such a potentially dry subject - UI/typeface on maps - is the most fascinating thing I've read today. Extraordinary well done by the author.
I have to agree with your comment. The more I read the more I was drawn into the article. He had a previous post that was on HN a while ago that I found pretty well written too - http://www.41latitude.com/post/557224600/map-comparison