I know we have a number of Joe cartoon fans on this board, and I just read that Steve Gerber, the story editor for the first season of the Sunbow series, died on Sunday:
http://forum.newsarama.com/showthread.php?t=146401.
Though he was best known to many as the creator of Howard the Duck, he worked on dozens of comics, and several animated series-- Not the least of which was G.I. Joe. Though he only wrote four episodes (including one of my favorites, "Cobra Stops the World"), he was involved in overseeing the production of pretty much every script from the first season and did re-writes on many of them. So you could say his guiding hand was involved in basically all of the first 65 or so episodes of G.I. Joe.
I found an interview with him regarding his time on G.I. Joe here:
http://www.joeheadquarters.com/interviews_gerber.shtml
I probably knew more about him as a comic book fan, having learned only a couple of years ago that he was so involved with G.I. Joe. But no matter how you might be familiar with him, it's sad to learn that he's gone.