I made a mockup of how you could use metalinks for ISO downloads:

http://www.metalinker.org/centos/

I made them all with metalink tools (http://prog.infosnel.nl/metalinks/) but only linked in the ones for 4.4.

Someone who is more aesthetically inclined could design the page nicer. I like it because you've got single links that can use all the mirrors and automatic checksum verification, and you see which archs are updated for the current release. People can choose to download the old way, from one server and verify the checksums manually if they want to.

(( Anthony Bryan )) Metalink [ http://www.metalinker.org ]