Grognardia has now posted that David Arneson is, in fact, alive and being cared for in a hospice. This is amazing news and my spirits are lifted substantially. I do have to apologize though for misreporting this. I'm sorry, but that's the trouble with the internet, when news spreads it spreads fast, even if it's false.
Unfortunately Dave is in really bad health, so we just have to wait and see what happens. It's a great thing that we haven't lost this awesome man, but things don't look good for him.