Sort of. I know that NYC isn't the center of the world. I think this app can be both a critique of that myopia and a genuinely useful travel app. But it's interesting to find out what "Williamsburg" means to different people. Is it about coffee shops, 20-somethings, rapidly rising housing prices? Anyway it's a real app, you can download it in the app store or read about it on Gizmodo.
This heatmap represents over 8,000 user-submitted points representing the most Williamsburg-like areas of hundreds of cities. It's heavily skewed towards the initial data points that I added myself, which were based on a Gawker survey, the locations of American Apparels, and personal opinions.