Some interesting Tree House links

http://www.treehouseworkshop.com/  ...a company specializing in TreeHouse design, consultation and construction services.
The TreeHouse Workshop crew are experts in the field of suspended foundations. We design and build our own hardware devices to fit almost any situation. Arborists and structural engineers provide reassurance of its strength. We have seen many situations and can find workable solutions. Join us for a week of work and reward. TreeHouse Workshop has organized its first honest to goodness workshop!

http://treehouses.com/institut.htm
Out 'n' About Treesort & Treehouse Institute of Takilma
At the Treehouse Institute of Takilma, we offer Treemusketeers several courses. Like most institutions of higher learning, we
offer both core and elective (extree) classes. Unlike most institutions, our elective classes are geared totally to the individuals'
desires.  We do not dictate curriculum, we allow each student the opportunity to help create curriculum. We do, however, expect each Treemusketeer student to either have an un-abiding interest in treehouses and treeminology or pursue one of our alltreernut majors.  Also see there main page http://www.treehouses.com/

http://www.maui.net/~hanalani/  Tree house resort in Hana, Maui
Tree Houses for Rent in Beautiful Maui, Hawaii near Hana.
You will find a magical, romantic getaway here, three miles from Hana town. A spectacular ocean view overlooks a flower farm from the jungle treetops! Please use the map above to explore the possibilities that await you on our island paradise.

http://www.nahiku.com/  The Nahiku Tree house is located on a four acre parcel of land on the East coast of the island of Maui.  From the deck you'll enjoy a panoramic view of the Pacific Ocean to the East, and, the Maui volcano Haleakala to the West.  The platform deck on which the tree house is situated is approximately 28 feet above the ground in a 75 foot Mango tree. The entire deck area in the tree is approximately 750 square feet......

http://www.rainforesttreehouses.com.au/
Fur 'n' Feathers Rainforest Tree Houses offer accommodation with a perfect balance of luxury, wilderness and privacy.
Situated only 90 minutes from Cairns in North Queensland, and central to all Atherton Tableland attractions....

http://www.livingtreeonline.com/
Jonathan Fairoaks has been building treehouses for 41 years. He is an ISA Certified Arborist who enjoys preserving trees.  Let him help you design and build the treehouse of your dreams.....Jonathan has built treehouses in Chester County PA...