I couldn't find any previous mention of Spiral Island here, so I wanted to share this with ya'll.
[img width=600 height=342]http://www.geocities.com/spiral_island/collage2.jpg[/img]
The floating Spiral Island was created by Rishi Sowa in 1998 using thousands of empty bottles, mangrove trees and a few other materials. Though not fully sustainable, the island was a complete residence including a hut, self-composting toilet and solar oven. The island was destroyed in a hurricane in 2005, but Sowa has already started building a second island. While not a project rewilders would be likely to imitate, I do think we can take inspiration from it.