I just started using a product called Ptunes that will work with DRM protected subscription services like Yahoo Unlimited and Rhapsody. With an
adapter, it is possible to play back music from the Treo using the aux adapter on the car. I tested it with several albums I downloaded from Yahoo and Rhapsody and it sounds great. Yahoo is the cheaper of th two services and uses 192kbps instead of the 160kbps that is used by Rhapsody.
If you do not always want to carry around an mp3 player, this is a cool way to hear tunes using your phone.
