I love the ideas and concepts behind the Harley Davidson Ride Planner. Its not only a great example of mashups but is also an excellent social computing application: it allows users to create and share ride information. In addition to that the application also brings together multiple sources of information: HD Dealers, Hotels, Events, Fuel. For example, clicking on the "Dealers" icon populates your map with the entire database of H-D Dealers. You can locate Best Western Hotels along your ride route and book rooms at special H-D rider rates.