I think the guy is a new ager.
Thread on him here:
http://www.newagefraud.org/smf/index.php?topic=54.0And there's more if you search on his name (use the search page accessed via the left-hand nav bar).
In the eighties he was in Shaman's Drum magazine all the time, and leading workshops all over the place. As far as I can tell, he has spawned many, many frauds who are out there selling their ideas of South American ceremonies, "initiations", and spiritual tourism.