From the website:
MarineMap is a web-based decision support tool for open and participatory spatial planning in the marine environment. MarineMap offers a simple, flexible and powerful means of gathering expertise from resource managers, scientists, stakeholders and public in a process of collaborative decision making.
The MarineMap Consortium brings together personnel and skills from UC Santa Barbara, Ecotrust, and The Nature Conservancy. We create open-source spatial tools that integrate and illuminate the human dimensions of marine science and policy.
You can follow MarineMap on Twitter at @marinemap.