I just checked a recent alaskaair.com booking and can confirm that, where before it would have my frequent flyer information listed as "American 111AAA1" it now says "American 111AAA1 - AA Elite". I am flying on the same reservation as Mrs. Microwave, however, so I was already in an exit row and cannot tell whether this would get me exit row independently.

If this is a harbinger of reciprocal (i.e. bidirectional) baggage fee waivers, priority boarding and exit row seating, bravo to both companies for finally working this out. I know quite a few AS elites in the Seattle area that fly DL when needed simply for the reciprocal bennies--in some cases, AA may have been a better option but were not considered due to a lack of reciprocal benefits.