Amazon Route 53
Most blog articles I’ve read about Aliases deal with using an Alias in the root DNS record for referencing an S3 bucket. An alias record can also be used to reference a cloudfront distribution, or xxxx.cloudfront.net. I was previously under the false impression that you had to use an S3 bucket as a foward or 301 redirect in order to reference a separate site. This doesn’t have to be the case if you are using Route 53 as your DNS.
On a related note, alias references are free, while CNAME references are charged when using Route 53.