AWS has announced another class of S3 storage called Standard - IA.
Standard – IA tier of S3 gets you down to 0.$0125/GB of storage for 99% SLA and 999999999.99% durability.
Also they are reducing the price of glacier. “Effective September 1, 2015, we are reducing the price for data stored in Amazon Glacier from $0.01 / gigabyte / month to $0.007 / gigabyte / month”.
Great news for those interested in cost savings in AWS.