Interactive NYC Transit Map - Greg Brail has created a Google Maps version of his long standing Interactive New York Subway Map. It's very simple.. you click on a starting point and an ending point, and it calculates the shortest subway route between those two points and displays them on your map.
Gothamist NYC City Guide - The Gothamist has always been ahead of the curve when it comes to Google Maps. Regularly featuring the lastest Google Maps for NYC, they have taken it upon themselves to create their own Google Maps project; "Gothamist Maps" is "the best way to see what's going on and where right now." It features Yahoo!'s Upcoming.org events from around the city, user content from Dodgeball.com and allows for user submitted markers as well! (More information here)
Update: Alkemis.com has gone Local! - The previously mentioned NYSee Google Maps explorer for NYC has changed it's name to Alkemis Local. The interface has been cleaned up and makes filtering content on the map easier. The map aggregates traffic cameras, Yahoo! Traffic, Weather, Local Picks, Flickr Images and Fandango Movies. A truly awesome Google Maps powered resource for NYC!
NYC Buildings on Google Maps - CityRealty.com has released a Google Maps interface for New York City Apartment searching. The search tool allows you to filter listings by the number of bedrooms, location and price range, while the search results are plotted for you on a Google Map.
Central Park Birding Locations - Here is an interesting outdoor urban Google Maps mashup showing the locations of various types of birds in Central Park. Info balloons show pictures of the birds as well as referencing the page numbers from the book titled: "Birds of Central Park"
Technorati Tags: [NYC], [New York City], [transit], [Google], [Google Local], [Google Maps], [GoogleMapsMania]