Start here for wonderful coastal information from NOAA, USA
Policy Library is a great resource with lots of excellent links. http://www.policylibrary.com/index.html
http://www.landecon.cam.ac.uk/resenv.html
http://iisd1.iisd.ca/default.htm
http://www.sustainablemeasures.com/
http://www.landecon.cam.ac.uk/resenv.html
http://www.accountability.org.uk/
http://www.deq.state.va.us/coastal/links.html
http://www.sma.washington.edu/cmj/call00.html