The shareable tree was one of my favorite to look at, as it includes more generations than the default on the Nav Home page.
I use it to share trees with family members who otherwise don't want to join the site (but maybe they will).
There were several other treewidget designs to choose from, but now I can't find those either. Its ok that its not on the main menu, but it would be nice if it were a little easier to find.