Based in the Bay Area, the Seasteading Institute‘s mission is to “further the establishment and growth of permanent, autonomous ocean communities, enabling innovation with new political and social systems.” They just hosted their second annual Seasteading Conference, and this weekend, they host the first annual Ephemerisle Festival of Politics, Community, and Art, being held October 2-4, 2009 in the Sacramento River Delta. The entire festival will be in the water, with a large central community platform augmented by participants bringing their boats, rafts, and unique homebuilt floating structures. The goal is to “provide a fun and innovative venue for the public to get their first taste of seasteading.” There will be music, dance, open mic performances, and even classes on how to build your own floating platform. One of the theme camps, named Apocaisle, is working on producing a how-to for modular floating platforms that are easily reproducible; they are also working on creating Ephemerisle’s pirate radio station. Ephemerisle’s wiki has lots more information, including attendees platform-building notes, like Matt Bell’s DIY for building a floating camp platform for 2 for under $120.