Does Staten Island suffer from the bridge curse? Or do all neighborhoods in NYC(except Manhattan) suffer from that?
edit: ouch, two bridges.
Not sure what you mean by bridge curse. Of course a place called Staten Island is going to require a bridge to leave. Or, if you prefer, a ferry. http://en.wikipedia.org/wiki/Staten_Island_Ferry
Isn't there the subway and light rail?
The subway doesn't go to Staten Island; they have their own line (Staten Island Railway) which ends at the ferry, and everyone takes the ferry.
There is no light rail in NYC. Everything is either heavy rail (subway, PATH, SIR, Airtrain), commuter rail (LIRR, Metro-North, and NJ Transit), or bus. There is light rail in Jersey City and Newark, though.
All* of NYC's heavy rail, as well as the Staten Island Ferry, runs 24/7, which makes it unique among American systems, and possibly worldwide- the only other 24/7 rail lines in America are PATCO (which is basically Philadelphia's PATH) and part of the El.
* Not quite true, as there's one station in Lower Manhattan which close on weekends (
http://en.wikipedia.org/wiki/Broad_Street_%28BMT_Nassau_Street_Line%29), as well as the anomaly that is the northbound-only Aqueduct station (
http://en.wikipedia.org/wiki/Aqueduct_Racetrack_%28IND_Rockaway_Line%29). Wikipedia says five stations aren't served full-time, but the other three are part of larger station complexes which are. Also some lines stop running and others cut back to shuttles, but every other station continues to be served.