I suppose eventually I'll embrace the iPhone and apps but, for now, I use my compact, Motorola Razr. It fits nicely in my shirt pocket and excels at one thing... making calls.
What's lacking in the music industry right now and with itunes is that it's not a great model for discovering new music. Internet radio and all-you-can-eat streaming services like
http://www.mog.com are the future. I do think there's no reason not to offer extra info like videos, lyrics, photos, apps etc. to the delivery to encourage converting new listeners to fans.