Sorry to hear this. I am glad that the movie gave him more widespread recognition in his final years. His stuff wasn't always my cup of tea, but I admired the fact that a guy like him (a Joe Blow) could make it as a writer.
"I like your Christ, I do not like your Christians. Your Christians are so unlike your Christ."
Apparently this (warrenellis.com) is starting to make the rounds. Ellis posted to his blog about the SD Comicon, and then Joss replied in the comments, and if you're a fanboy you might enjoy the ensuing flamewar.