I'm a map geek--represented my elementary school in the state geography bee, as a matter of fact--and a friend recently sent me this map of NYC income distribution by neighborhood. Interesting stuff, especially when you comapre it with the New York Times mayoral election map and homicide map.
One question: how does it work that the median income in four out of five boroughs (including Manhattan) is lower than the citywide median income (according to the map above)? Brooklyn, Queens, and the Bronx all have significantly lower median incomes, and Staten Island, the one borough above the median, is only 2% up and isn't that big (relatively)? I don't have the data, but it just doesn't seem possible.