I don't use the Axim directly as an MP3 player much because I'm a homebody. :) But I do use it as a remote control for the
Squeezebox in my bedroom, and out at my pool I use it with
NetRemote as a remote control for J River Media Center on my PC where I have a wireless outdoor speaker plugged into the rear sound card output.
I've loaded some of my favorite MP3s on it for the times when I travel because I do like to fall asleep to music.