Amazon just announced a price change for bandwidth for outbound traffic from EC2 and S3. The result is up to 26% reduction in costs for all outbound traffic depending on your volume. Here are the new prices which are effective May 1
New data transfer price (effective May 1, 2008)
$0.100 per GB – data transfer in
$0.170 per GB – first 10 TB / month data transfer out
$0.130 per GB – next 40 TB / month data transfer out
$0.110 per GB – next 100 TB / month data transfer out
$0.100 per GB – data transfer out / month over 150 TB
You can read full details here.