Has anyone heard of any of the cycle/gps companies working on this? With 3.0 support of 3rd party accessories someone needs to make a killer cycling app. Bike cyclometers use a small magnet attached to a spoke and a sensor on the fork to count rotations and calculate milage without GPS signal. This combined with GPS and route mapping on sites like bikely.com. You could have all kinds of information on your phone. - Your ride mapped out how far you have to your destination. - A realtime elevation profile. - Mileage/Speed Please someone make this.