I use the Nike+ GPS iPhone app to record my daily workouts. Recently, the app stopped syncing my miles, so I contacted Nike+ support through Twitter. We exchanged several tweets as the support staff tried to work out the issue. Finally, they told me that I needed to set Mobile Safari to "always allow" cookies. I asked them what Mobile Safari and cookies permissions had to do with the Nike+ app. They didn't answer my question but followed up with a simple "Does it work now?" Now I'm wondering whether the Nike+ GPS app might be setting cookies on my iPhone so Nike can track my web browsing. Does this sound possible? Or am I just being paranoid?