David Mahfouda and Alex Pasternack discuss a mobile app that could make NYC’s fleet of 13,000 taxis a more efficient, affordable, and social mode of transit.

Communication designer Sidney Blank shares the story behind STACKD, a new social networking site that helps people in Manhattan office buildings get in touch – for business or beers.

Frank Duffy and Rosalie Genevro reflect on the buildings of Lower Manhattan, critically assessing what our use of commercial space can tell us about our changing city.

The founder of Zipcar and GoLoco talks about everything from mesh networks to taxi stands to why “infrastructure is destiny.”

Laura Forlano shares some examples of coworking in New York and discusses their implications for where, how, and with whom we work.

Architects Jenny Broutin and Carmen Trudell reflect on the development of their prototype for energy generating revolving doors, offering a case study for other innovators.

With Post-it Notes for Neighbors, Candy Chang playfully calls attention to the commodification of information exchange in public space and calls citizen-designers to action.