iPod + Nike – Nike
Remember my Tune your run article? Apple & Nike cooperated to build a set from sport shoe and sensors to measure your calories etc. The good news is you can replace the "sport kit" with something cheaper and – you don't need a Nike shoe for that.
Accessories maker Marware has a solution: the Sportsuit Sensor for iPod Nano, a waterproof neoprene pouch that sits atop straps that run around your running shoes and protects the sensor that talks to your iPod. The whole thing retails for about $20, so you could save yourself some dough and feel like you've stuck it to the Man all in one day.