“This essay proposes a novel approach in the attempt to find one or more versions of utopia: A distributed matrix of hundreds or thousands of cities that float on the oceans, holding physical life-support technologies and high standards of living constant across all cities, and making slight variations in the social fabric from city to city, based on local resident preference. This is not so much a blueprint for any one utopia, but rather, a plan for a testing laboratory to allow individual people and whole societies to find their own versions of utopia using the scientific method on a grand scale. ” http://reality.sculptors.com/~salsbury/Articles/distributed.cities.book-copy

and a few more…

• http://reality.sculptors.com/~hyprmail/floating-cities/
• http://www.utopianideas.net/
• http://www.oceania.org/ (now defunct, but some decent renderings)
• http://news.nationalgeographic.com/news/2009/05/photogalleries/seasteading-sea-buildings-pictures/index.html

• “For each such rare project that sees (usually brief) life, there are many unfettered by actual existence” > http://www.inthesetimes.com/article/3328/
• “Seasteading: A Practical Guide to Homesteading the High Seas” > http://seastead.org/commented/paper/index.html

“The following is a proposal for the founding of a new country on planet earth. Tentative completion of Phase I (initial construction and formation of basic self-support systems for 5000 people) is set for the year 2025.” http://reality.sculptors.com/~salsbury/Oceana/Oceana.html

… and in history

• http://www.faqs.org/faqs/oceania/faq/