For many years, Mike & I each had USAir credit cards & Dividend miles accounts plus we each had AA miles accounts that we had for over 20 years. Back in late April or early May, after learning that the 2 milage programs were being merged, I received mail that said AA had assigned us new AA account #s for each of us that contained our Dividend Miles. Then I learned that I had either to call in or go online to physically merge my 2 AA # and Mike's 2 AA #s. It was easy to do online. I kept the NEW AA # for both of us, since for us it was tied to our new AA credit cards. I had the option to continue to use the old # or the new #. I am sure the poster who is concerned about his miles will find that his US Air miles are already in a new AA account.