Amazon.com: Sensor Pouch for Nike+iPod Sport Kit Sensor : Electronics
awildermode: What Happened to the Nike+ App?
Nike + Sports sensor | eBay
Nike+ - Wikipedia
How the Nike + iPod Works | HowStuffWorks
Put an IPod Nike+ Sensor in Any Running Shoe in One Minute for 5 Cents : 4 Steps (with Pictures) - Instructables
To everybody who has a Nike+ sensor: Simply 3D print a sensor holder, apply to any shoe and start running again .. | Baby shoes, Wearable technology, Wearable
Review: Apple Computer Nike + iPod Sport Kit and Sensor | iLounge