Hurry over and get a Free $3.00 Amazon MP3 Voucher! This is available today only, so there is only 10 hours left to grab it (or while supplies last)! It looks like you need an Amazon account to get it, and they ask for your credit card because they will charge you if you spend over $3.00.
When I signed up for mine, it said they will not charge you unless you go over the $3.00 Voucher. You only have today to buy it, but your $3.00 voucher is good until 7/12!