Pointless technology--bigger potential
So you might want to have shoes that have WIFI built-in, but why? So you can download your jogging trip from the hotspot at Starbucks? I'm pretty sure there is no point.
Once again I'd like to plug the idea for bluetooth multi-device set-ups: you could have flash memory in your shoes, along with a processor. Then you could have a bluetooth (BT) chip that communicated with two devices: headphones and a wrist-mounted mp3 player GUI (this could even double as a watch--gasp*).
Tada! Nike customers will pay for it. Make it Nike!
Do it Nike! Do it!
Just do it!