Originally Posted by FlyMeToTheLooneyBin

Not fully compliant yet, without multi-airline itineraries.

Originally Posted by Xero

You can hold any codeshare flights. But not if the flight is marketed by another airline.

Also, AA's front page now says "Due to technical problems, the initial prices shown on AA.com do not include taxes and fees. Taxes and fees will be added prior to payment." Looks like AA did not do a good job preparing for this day.