One of my favorite website Ajaxian, http://ajaxian.com/, released an article on jsTree, http://ajaxian.com/archives/jstree-nears-10-solicits-feedback I don't if it's too late or if guys already know about "jsTree". Please check it out and invite the developers of "jsTree" to help with jQuery UI Tree widget because I know it's a complex widget by itself. jsTree Official Website: http://www.jstree.com/ Sincerely, Will