Tradebit just started a new MP3 affiliate program with shareasale, where they offer over 1.5 Million MP3 songs for instant download. The actual payout is 7%, quite nice! Also the referal for new webmasters in in place and you can earn some referral cash also on the sales of the webmasters your referred to the program.

Check it out on their affiliate list:

http://www.tradebit.com/layouts/reseller.php

and sign up there!