With the release of the Cellular South A854 Milestone/Droid rebrand, users of US Cellular and other providers that use MIN@provider.com instead of MDN@provider.com (cricket, vzw, metro) will finally be able to get 1x/EVDO working. In particular, the radio doesn't overwrite the HA authentication fields on reboot. However, the Cellular South sbf hasnt been leaked yet. If anyone has access to this, I encourage them to share with the community not only for this purpose, but also so Cellular South users can flash back to stock for warranty/personal reasons.
Thank you to a very special somebody, you know who you are!