Bruce Conner: The Art of Montage was at the Film Forum in NY this month. A bit far for me unfortunately:)
But there is a great review in ARTFORUM here: http://www.artforum.com/film/id=26797 and I’ve just ordered a DVD with some of his films – Cinemad-Amanac 2009- Curated My Mike Palnte from – http://www.cdwow.com