But it sounds like he wants to take the recorded conversation FROM the iPhone to something else. There is a good voice memo app that people favor called Audio Memo I think. Check it out in the App store. This will record on the iPhone, getting it from there to something else is another story.
I've done this with TotalRecorder. Just connect your iPhone to your computer's line-in. I've done this to record ringtones and other audio from the iPhone.