I never tire of telling our customers that they'll be saving money by using AWS!
Effective April 1, 2010, we'll add up the bandwidth you use for Amazon Simple Storage Service (Amazon S3), Amazon Elastic Compute Cloud (Amazon EC2), Amazon SimpleDB, Amazon Relational Database Service (Amazon RDS), and the Amazon Simple Queue Service (SQS) on a Region-by-Region basis and use that value to set your bandwidth tier for each Region. Depending on your bandwidth usage, this could mean your overall bandwidth charge will be reduced, since you will be able to reach higher volume tiers more quickly if you use multiple services.
We're also going to make the first gigabyte of outbound data transfer each month free.
You'll see both of these benefits in a new entry on your AWS Account Activity page. We'll combine the bandwidth used by the services listed above.