You guys know about Windows Live Search mobile right? Well one of the cool features that I just found out and decided to record is the "Center on GPS" feature which effectively turns your Live Search application into a free GPS Navigation software. Only thing lacking is the voice.
Obviously in order to get this working you need a Bluetooth GPS receiver paired with your Windows Mobile device. I found it a little cumbersome when setting it up the first time, as the Bluetooth configuration application doesn't tell you which COM port it listens to. The most typical COM port is COM6. All you need to do is to go into Live Search and configure it to listen to COM6 for a GPS signal.
Try it out for yourself.