North-West NSW, not far from Lake Peery, a few weeks ago. They seem to be getting more common. I have seen them on several of my previous trips outback.
I was working up at the Olympic Dam mine near Roxby Downs back in the early 90s for my mandatory university work experience.
I recall vividly that the environmental staff there mentioned that the Inland Taipans had been seen not far north of there, up on the Borefield Road - which was a lot further south than they had previously been seen.
Would be interesting to see if their territory has spread even further.