Historic Rammed Earth is Paul Jaquin's web site which has details of rammed earth's sustainability credentials discussing CO2 emissions, thermal and structural performance and more. Arqui-terra Fotos an msn group with a collection of earth architecture from around the world. Rammed Earth is for Everyone is a blog devoted to rammed earth. Good bibliographies and examples of soil mockups. Leem a Dutch web site with a wide veriety of links to earthen projects.