Forgotten NY: Lots of reading assignments from here; a giant site full of information and history about NYC
NYCSubway.org: Everything anyone could ever want to know about the subway
NYCRoads.com: Everything anyone could ever want to know about tri-state area roads
City guides
NYToday.com: The New York Times city guide site
Vindigo: If you have a Palm OS handheld computer, Vindigo makes a great, free, downloadable city guide
Odds and ends
Atlanticave.org: A site about the rediscovered Atlantic Avenue subway covered in the "Walt Whitman's LIRR" reading assignment
Jack was talking in class the other day about New York's "scripts," and mentioned the Broadway songs written about the city. Well, Fynsworth Alley, a Broadway soundtracks retailer, does a weekly webcast radio program of showtunes, and one of their recent shows covered "New York Musicals." Click here to go to their radio show homepage (which has a list of archived shows, including the NYC one), click here to go directly to the show. You'll need Real Audio, which you can download for free, to play the show.
If you can think of anything else useful or interesting that should be linked here, e-mail me.