Notable communities: Boston, New York, Philadelphia, Seattle
Local angle: New York culture blog has expanded into other global creative hubs. Targets 25- to 34-year-olds; garners almost 14 million page views monthly.
NBC LOCAL MEDIA
Notable communities: Chicago, Los Angeles, New York, San Diego
Local angle: GE is using its owned and operated local TV stations to produce "Locals Only" content along with area sites and magazines.
Notable communities: Preston Hollow in Dallas, Park Slope in Brooklyn
Local angle: Uses automated algorithms and blogger submissions to tag stories by location, letting users create their own "paper."
Notable communities: Lansing, Michigan; Pleasantville, New York; Wakefield, Massachusetts
Local angle: A pioneer that survived the first dotcom boom, now focused on its most vibrant towns.
Notable communities: Atlanta, Boston, Chicago, Detroit, Houston, Miami
Local angle: The recipient of a Knight News Challenge grant collects local data, from crime stats to restaurant reviews.
Notable communities: London, Kentucky; Dyersburg, Tennessee; Paris, Texas
Local angle: Backed by Gannett, McClatchy, and the Tribune Co., it uses search-engine optimization to rank and sort stories.
Notable community: Loudoun County, Virginia
Local angle: In 2007, The Washington Post Co. tried to create an active hub for an affluent D.C. suburb. The venture, though still breathing, has been a flop both financially and editorially.
Notable communities: Bar Harbor, Maine; Hamptons, New York; Gulf Shores, Alabama
Local angle: Network of community sites whose material is periodically printed as newspapers.
A version of this article appeared in the September 2009 issue of Fast Company magazine.