Another deal thru AmazonLocal (even if there are no local offers in your area):
Free Voucher Worth $3 Off Any MP3 Album ($5.99 or Greater) from Amazon MP3.
Grab the voucher now and you can use it anytime until thru September 2, 2012. First, you click HERE to redeem the voucher code (which you can see at AmazonLocal by clicking on Your Offers, then clicking on View Code to get the promo code, then the discount is automatically applied to the next MP3 purchase that qualifies (including any gift purchase).
The offer claims that it will last thru Aug 20 or while supplies last. It's that last bit that is important, as they have previously sold out of these vouchers before noon on the day that they have offered them.