Famous Forumite

Jim Frenkel, having founded the Forum, went on to become an SF editor at TOR books.

Louis Stathis, President from 1971 to 1973, was an editor for DC Comics and wrote for Heavy Metal magazine.

Tom Kidd is an award-winning artist who's done lots of book covers for many prestigious publishers and some full book illustrations. He's been nominated for the Hugo four times. He's a Fringe Forumite, but his wife was a "full-fledged member of the SF4M".