Check this out. Apple and Nike have partnered to finally make a device that integrates with the iPod that keeps track of how many calories you've burned / distance traveled while working out! All I have to say is FINALLY! It seems like such a long time ago but, training for a marathon with a Forerunner 201, and a 3G iPod strapped around my waist was a pain in the ass.
Notice how in this picture, Steve isn't dawning his standard issue New Balance running shoes, but instead wearing Nike's. What a sell out.