On July 20, 2020, as part of FPSAC 2020 (online), there was a session devoted to remembrances of Ron Graham. Video of the session is available on YouTube. The session included a viewing of the George Csicsery film Something New Every Day: The Math & Magic of Ron Graham, contributions from Peter Winkler, Richard Stanley, Andrew Odlyzko, Glenn Tesler, Jeff Lagarias, Catherine Yan, and Jacques Verstraete, and a reading of the events of one of Ron's last days. Several participants kindly shared photos, videos, and memories of Ron:
And courtesy of Marc Graham, Ron (age 74) riding a unicycle:
Update 12/31/2020: A New Yorker article about Ron (and John Conway and Freeman Dyson) is available here
Update 11/30/2021: The AMS Notices Memorial Tribute to Ron is available here