This is great news. I was more than certain that the show was getting axed, especially with the American Dad renewal. With a short order (no pun intended) of 13 episodes, I'd expect to see this come back next Spring, once they're run through the gamut of AD/Cleveland episodes early in the fall.
If you got turned off by the admittedly-awful first episode, give it another chance. You won't be sorry.
I know the guy that directed Nate and Margaret. It just played at a fest on the west coast, and it's about to play next week in Chicago, but that might be it as far as festivals. They sold it before they got in to many.