The "wow" factor on this site has to be the parts browser. In a three-step process, you choose a Manufacturer, which then makes the next dropdown menu live and you choose the Model, then that gives you a final list of types of products that are available for that model.
This one innovation has made it much easier for customers to find what they want from a complex database. Along with more traditional, easy to follow navigation, our HTML team did a great job of tying together the look the graphic designers presented with the programming team's functionality.