After looking over the site, I found many references to newage ideas, but not put in words that most would associate with nuagers. Most of the classes and activities are nuage practices called by another name.
From their description of the sweat lodge, they apparently have different people leading them at various times. When I get a chance, I think I might contact them to see if I can get names of those people, and find out if any are real native americans as the site leads the reader to believe they are. They also offer a mayan workshop.
They are affiliated with
http://gpei.org/ - great plains earth institute- under courses you can enjoy a mayan workshop.
Some of you may also be interested in this-
http://gpei.org/earthday2008/firestories.html the section of the page this is on is a link back to grandmas' farm.
I think that these people are spiritualists and environmentalists that may be honestly trying to help people, as well as the earth. However, some of the things on both sites makes me wonder...