I just reached a key milestone, where I created a PoC that shows the most important technical challenge that I had: The dynamic creation of GUI elements from TM WebServices calls.
In the image below, the important parts are the 2 'Available Libraries' List Items. They are dynamically created via AJAX calls to the TM's GetLibraries WebServices method:
You can try it in action at http://tm-mobile-test.apphb.com (automatic AppHarbor deployment via GitHub), but at the moment the Libraries links open the 'About' page and the other Items (Blog, Portfolio and Contact) still show the original Woody template content.