Southwest extended their booking schedule through Jan 4, 2016 and it looks like they are adding one new nonstop to Boston, one new nonstop to Seattle, and a second daily nonstop to Newark.
There's no press release yet, but BOS and SEA show up on Southwest's
route map (check the "nonstop only" box, then click on AUS.)
I believe these new flights start November 21. (I checked by trying to make dummy reservations for all three.)