Went home by taxi today and the driver was using a Mac Mini for his navigation system. He also had it connected to the Internet via a cell phone modem, apparently doing a lot of online shopping on Yahoo Auctions while waiting for customers. One would think that a usual car navigation system would be easier to use (for example by way of a touchscreen), but he said scrolling around with the Bluetooth mouse on his lap (a keyboard was sitting on the front passenger seat) was actually more convenient.