Here’s a delightful video for the event, if you haven’t seen it. It’s from Mondays with Merce, part of the materials produced for the centenary. This (Episode 15) is a cracker, with contributions from Christian Wolff and Gordon Mumma, Cage performing 4’33”, and some amazing insights into dancing to electronic music from Merce Cunningham (it’s in the nerve, not the muscle, apparently). Beautiful and fun.
The Prepared Mind, with John Cage and David Tudor: http://www.mercecunningham.org/film-media/mondays-with-merce/episode-15-the-prepared-mind-john-cage-and-david-tudor/