There is a very big series of articles by architect Richard Thornton, author of "Ancient Roots I: the Indigenous People and Architecture of the Southern Highlands" running online in The Examiner. He seems to be serialising most if his book and there are some very interesting sites described that we will be returning to.
A good place to start is here with an explanation and glossary of the various types of cultures and time periods he is writing about.
http://www.examiner.com/x-40598-Architecture--Design-Examiner~y2010m4d12-The-Mesoamerican-connection-part-one--ancient-words-and-marble-statues
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