AWS is commoditizing computing and has slashed the price for AWS data transfer.
“Effective July 1, 2011, customers will not pay for any inbound data transfer. Plus, we are slashing our pricing in each tier for outbound data transfer.
There is no charge for inbound data transfer across all services in the US and Europe. That means, you can upload petabytes of data without having to pay for inbound data transfer fees. On outbound transfer, you will save up to 68% depending on volume usage. For example, if you were transferring 10 TB in and 10 TB out a month, you will save 52% with the new pricing. If you were transferring 500 TB in and 500 TB out a month, you will save 68% on transfer with the new pricing. As a result of this pricing, you will see a reduction in your costs of up to 43%, depending on how much data you transfer each month.”[details]
Check out the AWS Simple Monthly Calculator and new data transfer pricing page.