Amazon now has a MP3 download section, and best of all the MP3s are DRM free!  This means any MP3 I buy from Amazon can be played on any device I wish to play it on, from my IPod to my XBox 360.  If you buy your MP3s from Amazon through Giveness, your selected charity will receive a 20% commission.  This commission rate will last through the end of the year, at which point it will go down to 10%, which is still a great commission rate.