phpBB: Amazon CloudFront CDN Modification

As my forum, LotusElan.net, has grown and gone international, I have had to focus on performance. This is especially true for image attachments and avatars. My forum is an automotive forum and it is not unusual for us to have topics with 10 to 15 image attachments. For example here is a typical posting: What Does Your Elan Look Like?

I had looked at a variety of items, but kept coming back to a CDN. After investigating the cost and complexity, I decided to install Amazon’s CloudFront.

Why CloudFront?