Amazon.com just announced that one can host static web sites in a S3 bucket. I went to their setup page at http://docs.amazonwebservices.com/AmazonS3/latest/dev/index.html?W
Create a hosted zone say mydomain.com. You can use a web based UI DNS30.
Now create a CNAME entry for this hosted zone.
Add a resource record
with following detail Name as "mydomain.com"
Type as "CNAME"
Value as "mydomain.com.s3.amazonaws.com"
TTl as "on your required configuration"