Can I buy the Nike + iPod WatchRemote and use the Nike + iPod Sport Kit I already have?
Yes, you just need to link the Nike + iPod WatchRemote to your existing Nike + iPod Sport Kit using the iPod menu. Here’s how: Nike+ iPod > Settings > Remote > Link and follow the on-screen instructions. This will link your unique Nike + iPod WatchRemote address to your iPod nano. Your iPod nano will now listen only to your Nike + iPod WatchRemote — it will ignore any others.