Inspired by this thread about NYC delis, and also by the fact that we now have a section of the forum dedicated to Chicago, what’s a good non-SDMB forum in this vein dedicated solely to New York City?
Wired New York. A bit heavy on development-related news, but it’s similar to many such forums dealing with the built and social environment of certain cities and metros, without the immaturity of social-oriented forums.
Chowhound’s various New York boards (they have separate ones for Manhattan, the outer boroughs, the rest of the tri-state area, and a couple more; the kosher one is relatively New York-centric as well) are good places to ask food questions like the one about delis.