There is a FS ticket for part of this thread: http://bugs.archlinux.org/task/7006
I support changing the link on the downloads page to reference the wiki. This would, however, allow end users to modify the mirror page thus changing the mirror list in a way that may be seen as more 'official'.
We could perhaps lock the mirrors page, but that semi-defeats the purpose of the change control suggestion.
Any thoughts or feedback of a high caliber?