Positioned as an alternative to the Apple-endorsed Nike + iPod Sport Kit, Wahoo Fitness' Fisica Sensor Key for iPhone and iPod touch ($80) is a small, very expensive little Dock Connector dongle that allows certain biking, running, and fitness apps to receive data from ANT+ compatible fitness products including heart rate sensors, speed and cadence sensors, and weight scales. The company sells a Premium Speed and Cadence Bike Sensor ($50), Soft Heart…
