I was using Nike+ for a few months my iPhone until iOS4 came out and made my Nike+ inoperable. The pod doesn't want to sync with the iPhone and won't register anything at all. Checked on the Nike+ boards and everyone else that uses an Apple device with ios4 are having the same problem.

So, I went out and bought myself a Garmin Forerunner 305 for $145 @ Best Buy. This thing is awesome, it makes the Nike+ look like a toy. The link below is from one of my trail runs. My pace was shitty because I was abusing my body in Vegas for 3 days beforehand.

http://connect.garmin.com/activity/40309763