We have all the data, we should automate this. Ideas welcome.
Created attachment 222033 [details] get-mirror-list-source.rb Possible starting point, parses mirrors3.xml on the web and outputs all of the mirrors we have in a space separated list. Just need to remove the rsync mirrors and get it in the correct "gentoo\t<list>" format.
Created attachment 222035 [details] get-mirror-list-source.rb uploaded wrong patch, previous comments still apply
Decided to go another direction and only list distfiles.g.o mirrors because users can still set their favorites via config file.. + 27 Oct 2010; Jeremy Olexa <darkside@gentoo.org> thirdpartymirrors: + Use top tier for mirror://gentoo, bug 307683