An application I wrote, that looks like iTunes and runs on any phone that supports J2ME (CLDC 1.1, MIDP 2.0 with JSR 75 and JSR 135).

There are some special mods to make it work with mplayer on ROKR E2. More details can be found here:

http://youtube.com/watch?v=coV06ChYWJo

http://chandan-pitta.blogspot.com/2007/03/ctunes-here-we-go-live.html