Up until he died, Hal Clement was at every single SFF convention I'd ever attended, bar none. I reached the point where, when I arrived at a con, I'd find myself starting to look for Hal, and the moment I spotted him, it was like the con had really begun. I still have half an eye out for him, even though I know intellectually he's long since gone.
I deeply regret that my path never crossed in person with Jay's, but I'm thinking maybe it'd be a great thing if everyone whose lives he touched directly or indirectly added a Hawaiian shirt to their con wardrobe, as an ongoing reminder of how we are a community together, despite our differences and disputes, and we can and should celebrate and remember the people who did good in our midst with such indomitable humor and courage and spirit.