Today, I noticed a few things are happening with maps.google.com around NYC:
1. Map view now shows pencil outlines of buildings
2. Map/Satellite/Hybrid shows locations of Subway/Metro/LIRR stations.
Personally, I hope this is a sign of things to come with google.com/transit adding MTA, Metro North, NJ Transit, and LIRR to the offering!
You'll get this for most important cities in the US if you zoom in to the maximum level in the street map or the hybrid view.