Apparently the conference "In Wittgenstein's Footsteps" is going ahead after all. They have had email problems, I'm told, which is why some of us have not heard from them. My intention is to try again to contact the organizer, perhaps by a more old-fashioned method.
(My source is an email from a reliable person who tells me that he is going. I feel unnecessarily clandestine leaving him anonymous, but I would feel worse publishing a private communication.)