Christopher Williams, an American musician and scholar living in Berlin, just completed his PhD dissertation, which is actually a website:
Tactile Paths: on and through notation for improvisers
Tactile Paths is a native website — filled with music, scores, videos, and other tidbits in addition to plenty of text about the interface of notation and improvisation in contemporary and experimental music. It features sounds and thoughts around Richard Barrett, Cornelius Cardew, Malcolm Goldstein, Lawrence Halprin, Bob Ostertag, Ben Patterson, and myself.
There is a large section on my Say No More project, which includes audio, images, scores, and Christopher’s writing. There is no other place on the web where all of these elements are put together like this.