Confirmed: AAdvantage and Dividend Miles Plan to Combine March 28, Last Day to Book US Airways Awards is March 25

Update 3/24/15:

American Airlines has confirmed that the integration of AAdvantage and Dividend Miles will begin, though the process could take several days.

Tomorrow (3/25/15) is the last day you can book US Airways Dividend Miles awards.

------------------------

The reliable rumor is that American Airlines and US Airways plan to combine their mileage programs on March 28, which is this Saturday.

US Airways and American Airlines legally merged in December 2013.
They announced in October 2014 that the AAdvantage and Dividend Miles programs would combine in the second quarter (April 1 to June 30) of 2015.
They announced a few

US Airways to Have Oneworld and Star Alliance Partners Starting March 31, How to Take Advantage

US Airways Premier World MasterCard with 40,000 bonus miles after first purchase to book these Star Alliance and oneworld partners

Earn 40,000 bonus miles after your first purchase and payment of the $89 annual fee*
First checked bag FREE on eligible bags for you and up to four companions on domestic US Airways operated flights
One companion certificate good for up to 2 guests to travel with you on a US Airways