I was very sorry to learn this morning of the passing of Dave Cockrum. I never met Mr. Cockrum but he was the artist on the Uncanny X-Men issues that hooked me as a kid, and I really enjoyed his work on his own series, The Futurians.
I was also saddened to hear of the passing of Jerry Bails, one of comic-book fandom's pioneers someone who helped pave the way for all the comic-book archivists that followed. I'm not sure many of the comcs-related publications I've been involved with ever would have happened without his work blazing the trail.
Clicking the links will take you to more biographical information and remembrances for both.