I have a standard SP2010 deployment (actually using MS's Office 365) and need to replace the Quick Launch with a tree navigation menu that will display sites, sub-sites, pages, lists, etc. in a parent-child hierarchal fashion similar to Windows Explorer. The menu will need to sync with the bread crumbs as well as users navgiate the site. I'm willing to purchase a web-part or component that does this. It needs to be scalable and to automatically update as new sites and documents are added. Any ideas?