I had a vision for an anarcho-capitalist free city state which I suppose is somewhat similar to this bitcoin town thingy, but I wouldn't start it anywhere inside of US territory.  My idea was to found it somewhere in the world that had a weak or non-existant government.  My favourite spot would be the western sahara.  The only government to have a claim on it is Morocco but no one else recognises their claim least of all the locals.  It is one of the most sparsely populated places on earth so there is lots of land up for grabs.  It is just desert with no natural resources except sunlight and sand but then so is dubai...