Metropolitan Transportation Authority
The official MTA Web site -- Provides great information about bridges, tunnels, subways, buses, and Metro North!
Motorcycle Parking in NYC
No, Virginia, there is no Santa Claus, however there may be good places to park a bike in NYC.
NYC Transportation
An excellent guide to transportation in and around New York City!
Transportation Alternatives
A 4,500-member New York City-area citizens' group working for better bicycling, walking and public transit, and fewer cars.