Please check the mirrors page @ Red Hat for more distro servers.
http://www.redhat.com/download/mirror.html
To get a distro that is not hammered, ping the address first, get the time of response and judge it from there. Most servers now have all the ISO's.
These are all really good servers, though some can be accessed through HTTP.
Can anyone release this internally here, or our people better off getting it from the registered mirrors?
Regards,
Cyberion