Just some more info on the music information here. With the 360's USB ports you can instantly stream from any music source. Also, if your 360 is connected to your home network you can stream from any active PC if you have set your PC's permissions to do so (like 3 clicks of the mouse).
Personally, I am on my PC all the time, so I use the Zune music software. Whenever I hop onto the 360 I can either go to Music Library on the dashboard, or hit the navigation button and go over to the "now playing" section and highlight any music that I have on my PC and stream it instantly; this goes for playlists too! I find this feature very nice when folks come over and they do not want to hear Halo in the background. Also, this prevents me from having to store the MP3s on my 360 itself so I save HDD space :)








