Gawker offers a satirical video travel guide to Brooklyn's Park Slope neighborhood. Nothing too informative here, more just cheap shots at the neighborhood and the stereotype it's become. The guide notes that while adults are mainly the homeowners in Park Slope, it is actually dominated by children with names like Olive and Farley. I really don't find Park Slope that pretentious?
There is also one on Williamsburg, but since I've only been there twice I can't really comment.