Bloomberg reports that we can expect an announcement of the soon-to-merge airlines combined leadership team by mid month. Also, no major anti-trust issues have developed. As for things that directly effect passengers, there’s this:

The pace of integration will vary according to the areas concerned, the CEOs said. The companies will begin code-sharing “very soon” after the merger, though it will be three to six months before US Airways transfers to AMR’s Oneworld airline alliance from the Star group to which it belongs now.

Combining reservation systems could take as long as a year, and it may be 18 months before the pair move to a single operating certificate, allowing them to function as one airline and share crew and planes.