NikePlus provides Integration of Nike, iPod, and WWW. There’s a community piece to this online as well, you can find other runners using their site (click on community tab). Pretty interesting, anyone out there try this? Edward from USAToday has a review:
“Nike + iPod records the time, distance, pace and calories burned in real time as you run (or, in my case, power walk). You can track those results on an iPod Nano and, after connecting the Nano to a computer, on the Nike+ website (nikeplus.com)”
The next piece could be GPS, you could even build mashable games to play, indicating where users are.
Update: Some people think this is a security risk, you could be watched! Conversations on Techmeme.