I found a real nice article on a mp3 player VeriTouch is working on that will hopefully be released in the near future, the 1st design, the iVue has a music player, hidden fingerprint scanner, cellphone, Wi-Fi and Blootooth wireless capabilities

In the future when you want to listen to the new U2 song, your fingers may have to do the walking—literally. Biometric firm VeriTouch has a scheme for a new breed of MP3 player that would use built-in fingerprint readers to unlock encrypted music tracks.
Full article here.