NPR News will work on all versions of the iPhone and the iPod Touch.
Note for users of the First Generation iPod Touch: When listening to an audio stream, you can change the volume by tapping the small double up arrows on the audio playback bar. This will slide the audio playback bar up revealing the volume control.
Note for user of non 3G iPhone (Edge): Your internet connection is not as fast as the 3G network and, therefore, you may have trouble listening to some of the audio streams. When this happens, please check that you have good wireless coverage or connect to the Internet using WiFi.