Other than the demo site that comes with Fox Trails, I've been developing a number of commercial sites using Fox Trails. Currently we have 15 insurance sites deployed. I've listed a few of them below, so you can see Fox Trails in action.
As you go through these sites, you'll notice ajax used on most of the pages for validations, dialogs and filling combo boxes. A small subset of these features have found their way into the included samples. As I mention in the documentation, I use the prototype ajax library. The Scriptaculous effects library is used for handling animation.
For these sites you'll need to use a valid illinois zip code. Try using 60601 through 60699, most of those should work. Please put Test in the driver's name so we'll know that you aren't actually interested in purchasing insurance. Then again, if you live in Illinois, you might be able to save a little money.