If I could use the Nike+ integration to pull/push running data from/to the Nike+ website then I will be a happy bunny.
I normally use an armband with my phone (purely for music) and my Nike+ trainers linked to my Nike+ watch whilst running. However, I hate having to plug the watch in to the PC/Mac to upload the run data, so it would be cool if I could simply run using the iPhone and have Healthkit monitor the distance, pace etc and push that up to Nike+.
I suspect it will only be an import style app, but oh well. Basically, what I'm saying is; I want to go for a run and have the phone track it all and sync with Nike+, with little to no user interaction