Currently I have it working for 2 levels of simple links. Actually no links are in this version. I have been able to create a submenu but not a sub-sub-menu. I believe it has to do with the way I access terms in the termset. I'm only about to get to the top terms in level 3.
How do I get all the terms so that I can match up guids and create a third-level?
Instructions: Create a blank Publishing or Enterprize Wiki Site Collection Change $appendUrl = "http://intranet.contoso.com/sites/spbranding" to reflect the site you're in Run PowerShell from Admin (Assuming you have the Microsoft.SharePoint.PowerShell snapin loaded If you get a lot of errors - Go into Site Collection Navigation and change the Global to Structual Navigation and retry script. Once Script Runs successfully go back into Navigation and choose MetaData Global Navigation and select the correct Termset (Don't create a new TermSet) Atleast two levels of menus should appear.