New paper out that I helped a little bit with: "A Demonstration of Interstellar Navigation Using New Horizons", where NSF NOIR Lab's Tod Lauer uses New Horizons images of the parallax Proxima Centauri and Wolf 359 (of Star Trek fame) to figure out the absolute position of New Horizons in near-interstellar space.
It's a very international collaboration, with participation from quite a few small-telescope observers in South America and Australia, and dedicated to the memory of a master Polynesian navigator who inspired some of the thought process. And Brian May too, because he's a friend of the mission.
My little role was in helping to analyze the pointing uncertainty in both the New Horizons and ground based data.