Many BA Golds and Silver like their access to Admirals Clubs and Flagship lounges when travelling on American Airlines within the USA.
Two of my fellow bloggers (GhettoIFE and One Mile At A Time) are reporting this and are saying that this has been removed, based on changes to the OneWorld web site. The offending page is here, which certainly supports what they say.
Not good news if true.
I tweeted American and they said that there had not been a change as far as they knew.