Who remembers the Nike+ iPod Pedometer? Went in your shoe under the insole and connected to your iPod via a separate 30-pin dongle. : r/RunningShoeGeeks
Amazon.com: Sensor Pouch for Nike+iPod Sport Kit Sensor : Electronics
Put an IPod Nike+ Sensor in Any Running Shoe in One Minute for 5 Cents : 4 Steps (with Pictures) - Instructables
Put an IPod Nike+ Sensor in Any Running Shoe in One Minute for 5 Cents : 4 Steps (with Pictures) - Instructables
Grantwood Technology Shoe Pouch for Nike iPod sensor - black
Amazon.com: Sensor Pouch for Nike+iPod Sport Kit Sensor : Electronics
Nike SportWatch GPS Powered by TomTom with Shoe Pod Sensor White/Silver 1JA0.017.05 - Best Buy