Can you have private URLs in Amazon's CloudFront?

In Amazon's S3 storage system you can have sort of private URLs using a special query string and expiring the link after a while.

Is such a private system possible using Amazon's CloudFront, which is based on S3?

From serverfault Rory McCann

• I am afraid you can't do it with CloudFront just yet, but CloudFront team is innovating rapidly and I am sure they will introduce this functionality relatively soon.

  Thanks Andy the developer of CloudBerry Explorer for Amazon S3 freeware

  From $pageUsers[$post.author].name

• Check out CloudFront survey to get an idea of their roadmap

  From $pageUsers[$post.author].name

• You can now serve private content from CloudFront.

  http://developer.amazonwebservices.com/connect/entry.jspa?externalID=3514&categoryID=216

  From michela