Comment 5 for bug 140458

It's been indicated to me that the ideal hosting location for the metalink files, from the wubi POV, is www.ubuntu.com; that requires buy-in from the ubuntu.com webmaster, who has been consulted and is considering the matter.

That would also solve the issue of keeping the mirror list current, since www.ubuntu.com already has this information; but no decision has been made yet that they will be hosted there.