From one of our beta testers: Clie NX70 should work if you install the MCA2 library which can be found here:
http://www.aibohack.com/clie/modclieaud.htm

This worked on our beta tester's NX70V. He was able to get music using it. I've never tried it, and can't guarantee that it won't cause problems. Your mileage may vary; take appropriate precautions before you try it!