Hi
Coral Cache is a distributed content caching system the requires little setup from your side. Appending .nyud.net to the domain part image src locations and leaving the rest as-is sends the requests via the Coral Cache network, and subsequent requests are served from there without touching the autopuzzles server. I suggest trying it, at least, if bandwidth costs are a concern.
Just a (hopefully) useful tip!
See
http://www.coralcdn.org/
