Got this from rec.travel.air in usenet. I am not validating the statement below but it may be of interest to those who are awaiting transfer of TW miles to AAdvantage.
"I found ou today from an American AAdvantage person that if you want to
fly AA on TW miles before they get around to transferring the
miles(which will take months) you may call American ONLY on the day you
are ready to redeem miles and make a reservation, and join AAdvantage
and tell them that you would like your TWA miles transferred to AA. AA
will call TWA, transfer the miles and close the Aviator's account. It
can only be down on the day you wish to make a reservation and redeem
the miles."