I don't own an ipod but am hoping to get one for Christmas. I had one question though. After downloading all my songs from my powerbook to my ipod, if I then go and delete songs from itunes on my powerbook and then add other songs, when I go to send the new songs to the ipod, will it erase the songs I deleted on my powerbook, or will it keep those songs and add the new ones from itunes? ie. can I fill up my ipod then delete the songs from itunes (as I don't want to take up so much harddrive space).