Hum. I would have preferred to keep "Fedora Legacy" and "fedora.us" separated at least as much as "Fedora Legacy" and "freshrpms.net" :-/
Oh, well... Matthias
Given that Fedora Legacy's goal is only security patches for the old RH distributions, it isn't unreasonable that Legacy "updates" remains compatible with Matthias FreshRPMS add-ons. You may want to leave out Legacy's "legacy" channel though because that may conflict.
Warren