A little while back I mentioned Pandora. I now have an additional alternative (to an MP3 player) for you. It's a service called JukeFly. JukeFly is a little bit different in the fact that you are listening to your personal music collection. You first sign up (free) and download their application. From there you point the application to the machine where you keep your music downloads. Now, no matter where you are you can listen to all of your music over the internet streaming. Seems like this would be ideal for people who like to be on the move with a laptop. You get to listen to your whole music library without taking up any of your hard drive space.