Not that this problem will be long-lived given the mash-up next week but... I've been crediting my US flights to CO to get the 500 mile minimums. This week, I noticed that CO is no longer listed as an option when adding a FF number at the kiosk. I tried putting "-CO" in anyways but the boarding passes listed my CO# with "-UA" and no star gold. CSR was able to add "-CO" and star gold with no problems. I REALLY hope 500 mile mins on US stick around after 3/3. Generally I have a rule to only fly US on <500 mile segments!