Inspired by this thread, I went to the voicemail page of iPhone and selected Apple Headset, then went to iPod mode and listened to a Terry Gross interview Podcast through the headset.
Not bad!! Agreed, it's too bad it also plays through the iPhone speaker, but its not too loud. The streaming quality is voice quality (not music quality) which is fine and dandy for podcasts.
It was nice to listen to a podcast unencumbered by cables! Apple should make this an intentional feature! 😉
JIm