BBC did a pretty good video [0] about it. Haven't really heard much about it since. Must be extremely exciting for scientists, as (to my understanding) this kind of self-fertilization is completely unheard of!
How is this different from other nitrogen-fixing species that are already known? Some olives, plenty of legumes such as soy beans, clover and alfalfa all have symbiotic relationships with bacteria for this.
It does it in a radically different way - pulling bacteria up from the soil into weird drippy goo from roots dangling midair. The video and various articles aren't totally clear on this point, but it suggests it can pull a lot more nitrogen out of the air than other known nitrogen fixing plants (which keep the bacteria underground on their roots).