We get this every time. The wheels of official announcements grind exceedingly slowly. Feel free to reserve judgement until you see it on Wikipedia. I went through the same clog dance with Berlekamp, Guy, and Conway.
There have been no official announcements in print that Wikipedia are willing to accept as definitive. I've got my information from professional research mathematicians who have worked in related areas, and knew him well.
I heard the news this morning from a close friend who I know to be a close friend of Ron Graham’s wife. I was pretty upset (still trying to grapple with him being almost 85!) and I wanted to see if there was another announcement, so I went over to Wikipedia and saw that it hadn’t been updated so I plopped over and added it. For my effort I get this screeching achtung warning sign accusing me of vandalism. I tried clearing it a couple times and an “editor” comes back and adds it again. What a bunch of jerks.
There have been no official announcements in print that Wikipedia are willing to accept as definitive. I've got my information from professional research mathematicians who have worked in related areas, and knew him well.