I'm kind of surprised that I haven't blogged Mr. Beller's Neighborhood before.
It's a neat collection of short stories about New York, organized by neighborhood and a rather large satellite photograph of Manhattan, broken up into neighborhoods. Tufte would be proud.
It's actually a little like something we tried for the ill-fated Bigtown -- of course, they've got lots more stories and more and better writers.
(fyi, the only browser I could get the map to work with was IE 5.2 on my OS X box -- Windows users will have varying luck)