For those of you who may use Smugmug, a developer in New Zealand named Nicholas Sherlock has made it possible to upload 360 degree panoramas from PTgui that display appropriately on Smugmug, with viewing in every direction as well as zoom in and out. Please check out my web site
http://www.starrettimages.com/Panoramas/360s/23354161_ZWPpmp#!i=1890430543&k=4GdjdXS for an example.
His directions are at: http://www.dgrin.com/showthread.php?t=208690
Visit my Nikonians gallery.