Most of these resources were made by 3rd party creators with as small amount of Auran content and a little payware tossed in. I would have to agree with vinny barb that content creators for 2009 and above are being offered little or no help. The last Content Creators guide is a TRS2006 version.
I've only made a small amount of Ausrtalian trees and buildings to 2004 standards. It would be good to be able to make a few for 2009 and 2010 as well. Without the large number of free content that has been used in TS2010, you sure wouldn't have much to build routes with.