Yeah, that is sad.... Comedians strike me as probably being one of the most unhappy of all professions. They get a lot of laughs by putting themselves down, and after doing it so often, it's very likely that it gets to them.
I pay my respects to Rodney Dangerfield and all other comedians who have passed away.
I read in an article from about a month ago, and it said he was doing good, so I really wasn't expecting this when I saw this. He always looked like he was in poor health. Because of this, I need to go and watch Caddyshack again this weekend...