I am totally enamored by the earthship concept. I plant to have one or something similar eventually. The problem that I have with them is the cost of accessing information about building one yourself. The earthship website is rather secretive about the process of earthship building, and seems to be more interested in selling classes and amassing volunteers than disseminating information in order to change the tide of building practices.
Though they do great work (especially overseas in poor areas that have faced disasters), but financial elitism in green living has always put my nose out of joint
Here are some websites I've found that have free information on the logistical aspects of earthship construction:
http://www.bluerockstation.com/earthship
http://www.treehugger.com/sustainable-product-design/how-to-build-an-earthship-step-by-step-slideshow-video.html
http://www.resilience.org/stories/2010-08-13/how-build-earthship-our-adventure-new-mexico
