At NetSquared 3, Thomas and Wendy of Green Map System got to know more about the OpenStreetMap project and parties from Mikel Maron & Andrew Turner. This is a kind of wikipedia for maps - a free editable map of the world, and anyone can add roads, bike paths and other geographic data to it. What a useful resource!   We thought, let's participate, parties like this could also become a good way to get people involved in our forthcoming Open Green Map, the social mapping website for sustainable communities (preview at http://OpenGreenMap.org).  So we are pleased to provide the venue for NYC's first open mapping party, hosted by OpenStreetMap's initiator, Steve Coast, at our global office this weekend! Steve says: