So what airlines are they good for?
class G
you would need a Y/M/S fare to upgrade.
"Chase Ultimate Rewards has some great transfer partners that they transfer to at a 1:1 ratio:
Airlines: United (Star Alliance), British Airways (Oneworld), Korean (Skyteam), and Southwest (which can in turn transfer to Airtran).
Hotels: Hyatt, Marriott, Priority Club, and Ritz Carlton.
Trains: Amtrak."
(Quote from main page)