http://www.insideflyer.com/articles/...e.php?key=4461

mentions the following:

"And as we know, US Airways also has a history with another oneworld partner -- British Airways. This situation might be like a class reunion. Of course if anything were to come from this, it might tear down the current wall that both American and British Airways have toward each other in relation to their frequent flyer programs -(the second longest feud running in the industry right after the American-American Express Membership Rewards feud). "


So what's the story about AMEX?