I may have moved out of NYC, but I still have an enthusiasm for the NYC subway. (There are bus-leaning NY'ers* and Subway-leaning NY'ers, I am definitely the latter.)
Another cool link with a video of the different NYC subway maps over the last 100 years. -> http://gizmodo.com/5871896/100-years-later-the-evolution-of-the-nyc-subway-map
Earlier links about the NYC subway that I've posted:
*eg insane people, why would I ever want to travel via a method that stops every 12' and is effected by traffic?