so sad!
It really shocked me when I heard the news because I thought I heard that we was writing jokes for David Letterman.
I remember sneaking downstairs when I was in middle school to listen to his monologue when my mom was watching it at 11:30.
He used to always say "It was sooooooooo cold (or hot, etc.) this morning..." and the audience would all say "How cold was it?"
It was all in the delivery!
His humor will live on!