I am always on the look out for new ideas when it comes to earth building. Here is one that is most interesting. The ancient China's rammed earth round or 'donut-like' homes. These consist of multiple levels with a kind of central court. These are really awesome.
Take the time to read this article. It is really interesting. This could be a great way of using the Superadobe technique of building to make a larger structure for a small village or town taking up the least amount of space while still building with earth. It is something I am going to explore more with the idea of building the sustainable Druid community.