PhillyEcoCity

http://phillyecocity.com

This site appears to have lost momentum.

See: http://gpen.phillyecocity.com/

The goal of PhillyEcoCity is to provide a virtual meeting place for people to find each other from across the Philadelphia region. It is a tool for the city dweller or the suburbanite who are working on installing a green roof to find each other, for green entrepreneurs or aspiring entrepreneurs to find each other, for people who oppose Marcellius Shale Drilling to find each other.
This is a tool to build critical mass.

Critical mass is what made Silicon Valley possible. Critical mass is what will make Philadelphia the greenest city in the country.

See Also Greater Philly Environmental Network (GPEN)