An iPhone app that explores unbuilt but proposed development for New York City.  Designers Irene Cheng and Brett Snyder share the inspiration behind their iPhone app and pose questions sparked by their research. Read their story and then go tour the unbuilt city.

This demo -- from Pattie Maes' lab at MIT, spearheaded by Pranav Mistry -- was the buzz of TED. It's a wearable device with a projector that paves the way for profound interaction with our environment. Imagine "Minority Report" and then some.

Light & Wire Gallery is a new collaboration in Los Angeles promoting emerging artists online. The gallery allows for the artists work expand on the possibilities of an exhibition beyond a white box gallery space. The web element allows shows to range from installation views of painting and sculpture, to interactive and endlessly linking web shows, photography with a blog narrative, and even streaming music players. It's a concept seemly simple, but ahead of the curve as far as art galleries are concerned. It's one to watch for sure.

50 cool inventions that focus on sustainability...