OK, an update.

They now have a couple more documents that can be downloaded/printed out, including a syllabus and training information for anyone who wants to teach kids about Hug-a-Tree.

http://www.nasar.org/nasar/hug_a_tree_program.php

And they also are selling a three-DVD set to supplement the written material.

http://www.nasar.org/garmin/product_info.php?cPath=18&products_id=392